Iraq launches operation to retake Tikrit from ISIS

Backed by allied Shia, Sunni and Iranian fighters, Iraqi security forces launched a large-scale military operation Monday to recapture Saddam Hussein's hometown from the Islamic State of Iraq and Syria (ISIS), a major step in a campaign to reclaim territory in northern Iraq controlled by the militants.

But hours into the operation, a key test for the embattled Iraqi army, the military said it still hadn't entered the city ofTikrit, indicating a long battle lies ahead.

State-runAl-Iraqiyatelevision said that forces were attackingTikritfrom different directions, backed by artillery and airstrikes by Iraqi fighter jets. It said the militants were dislodged from some areas outside the city. Several hours into the operation, it gave no additional details.

• Jihadi John won't have the same impact unmasked
• U.K. girls headed to ISIS-controlled Syria seen on video in Istanbul

The military commander of Salahuddin region, Gen. Abdul-Wahab al-Saadi, told state TV the operation was "going on as planned," with fighting taking place outside Tikrit mainly on its eastern side.

"Until this moment we have not entered the city," al-Saadi said. "God willing, we will enter, but we need some time as planned. ... God willing, victory will be achieved and Salahuddin will be turned into a grave for all terrorist groups."

Tikrit, the provincial capital of Salauhddin province, 130 kilometresnorth of Baghdad, fell to ISISlast summer, along with the country's second-largest city of Mosul and other areas in the country's Sunni heartland.

Tikrit a key supply link

Tikrit is one of the largest cities held by ISISand lies on the road connecting Baghdad to Mosul. Retaking it will help Iraqi forces have a major supply link for any future operation to retake Mosul.

U.S. military officials have said a co-ordinated military mission to retake Mosul will likely begin in April or May and involve up to 25,000 Iraqi troops. But the Americans have cautioned that if the Iraqis aren't ready, the offensive could be delayed.

The U.S.-led coalition launching airstrikes targeting ISISwere not involved in the Tikrit operation, Iraqi officials said. American officials had no immediate comment.

Past attempts to retake Tikrit have failed, however, as Iraq struggles with its armed forces, which collapsed in the wake of the ISIS's offensive last summer.

Iraqi forces battling near Tikrit also apparently have the help of Iranian Gen. Ghasem Soleimani, the commander of the elite Revolutionary Guard's Quds Force, who arrived there two days ago, the Iranian semi-official Fars news agency reported.

The powerful general has emerged as the chief tactician in Iraq's fight against the Sunni militants, working on the front lines alongside dozens of advisers from his country's Revolutionary Guard to direct Shiamilitiamen and government forces in the smallest details of some battles.

Fars also reported drones were flying over Tikrit, without identifying whether the drones were Iranian or Iraqi.

Hours after the offensive began, the UNspecial envoy in Iraq appealed to warring groups to avoid attacking civilians.

"Military operations reinforced by international and Iraqi air support must be conducted with the utmost care to avoid civilian casualties, and with full respect for fundamental human rights principles and humanitarian law," Nickolay Mladenov said in a statement.

7 troops die in explosion

Monday afternoon, a gasoline tanker rigged with a bomb exploded as soldiers and Shiamilitiamen tried to dismantle it in the village of al-Jalam south of Tikrit, killing seven troops and wounding 15, police and hospital officials said.

Al-Jalam, a farming area that has been a stronghold of Sunni militants, is located outside the Sunni city of Samarra, 95 kilometres north of Baghdad. All officials spoke on condition of anonymity because they were not authorized to speak to journalists.

Tikrit is an important test case for Iraq's Shia-led government, which is trying to reassert authority over the divided country. ISISfighters have a strong presence in the city and are expected to put up fierce resistance.

The offensive comes as momentum has begun to shift since Iraqi soldiers, backed by airstrikes from a U.S.-led coalition, took back the nearby refinery town of Beiji in November. Any operation to take Mosul would require Iraq to seize Tikrit first because of its strategic location for military enforcements.

Iraq is bitterly split between minority Sunnis, who were an important base of support for Saddam, and the Shiamajority. Since Saddam was toppled in a U.S.-led invasion in 2003, the Sunni minority has felt increasingly marginalized by the Shia-led government in Baghdad, and in 2006 long-running tensions boiled over into sectarian violence that claimed tens of thousands of lives.

While the TV said Shiaand Sunni tribal fighters were co-operating in Monday's offensive, Tikrit is an important Sunni stronghold, and the presence of Shiaforces risks could prompt a backlash among Sunnis. The Iraqi military is heavily dependent on Shiamilitias that have been accused of abusing Sunni communities elsewhere in Iraq.