The US military has said coalition forces may have killed a number of civilians after striking a van in a hospital compound in Mosul while targeting Isis fighters.

In a statement, the Pentagon said that a coalition airstrike hit a vehicle believed to be carrying Isis fighters.

“The van was struck in what was later determined to be a hospital compound parking lot resulting in possible civilian casualties,” it said, citing the Combined Joint Task Force Operation Inherent Resolve.

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It said it took all reports of civilian casualties seriously and would carry out a probe.

The strike comes more than two months after Iraqi operations to free Mosul began. Coalition air support has been a major asset that has enabled Iraqi advances on the ground.

The Associated Press said that on Thursday, Iraqi security forces began the second phase of their offensive against Isis fighters in the the city, pushing from three directions into eastern districts where the battle has been deadlocked for nearly a month.