A top Iraqi military officer said Wednesday it was clear that the devastating explosion on the west Mosul neighborhood of Jadidah this month was a U.S. airstrike, but he insisted the troops that requested it didn’t realize civilians were present. With as many as 200 people killed — the largest civilian death toll in decades from a U.S. airstrike — the March 17 attack has become a public relations nightmare for the internationally backed effort by the Iraqi military to drive Islamic State militants out of the country’s second-largest city. From Our Partners: Jeff Bezos Is Now the World’s Second Richest Person In an interview in Baghdad, Gen. Talib Shaghati Kenani, the leader of Iraq’s elite counter-terrorism service, said Iraqi forces that ordered the airstrike “didn’t know about civilians in the area” and were focused on killing the militants. Sharwan Kamil Waely, a security policy advisor to the Iraqi president, called the airstrike “a mistake” and “a tragedy for Iraqis” that had “created an obstacle for us.” He said Iraqi officials intended to question the U.S. military about why the pilot followed through on the request for the airstrike. “At the final minute, the final instant, the pilot has the authority to act because it is a moving target,” he said. The Iraqi officials backed away from earlier claims that Islamic State bombs caused the explosion. Still, the terrorist group appears to have engineered the devastation in what officials said is a new strategy. Mounting evidence from the scene and witness testimony suggest that militants herded civilians into an apartment block, then placed a sniper on the roof to provoke an airstrike. From his hospital bed this week, Abdullah Xalil Mutar told Iraqi military investigators what he saw moments before the massive blast leveled an entire city block. “It was an airstrike,” he said. “We heard the sound of the jet fire and we heard the rocket.” The 47-year-old truck driver and his family survived the blast that destroyed their house. He remained hospitalized Wednesday in the city of Irbil, 50 miles from Mosul, for a series of surgeries to treat burns on his back and foot. Another witness, 37-year-old Mubishar Thanoon, who was visiting his brother in the hospital Wednesday, said Iraqi soldiers were fighting militants in the neighborhood before the blast and so had to have known that civilians were still in the area. U.S. officials have said that the coalition was probably responsible for the blast but did not rule out other possibilities. American and Iraqi investigators were still sifting through the rubble in Jadidah on Wednesday. U.S. military analysts were reviewing more than 700 videos recorded over a 10-day period before, during and after the airstrike for footage of Islamic State forcing people into the building. Islamic State has long used civilians as human shields to deter airstrikes. Its commanders walk alongside children while in public, dart through holes and tunnels carved in civilian homes and set up headquarters in mosques, hospitals and schools. Gen. Joseph Votel, the top U.S. commander in the Middle East, told a congressional panel Wednesday that the strategy is “a way to distract our campaign.” “As we move into these urban environments, it is going to become more and more difficult to apply an extraordinarily high standard” to prevent civilian casualties, he said. When civilians are killed, Islamic State uses the deaths in propaganda efforts to turn the population against the Iraqi army and the international coalition. On Monday, a news agency affiliated with the group released a video that claimed to show unarmed civilians injured by a recent coalition airstrike on a maternity hospital in west Mosul’s Zanjili neighborhood. The strike has not been substantiated. An old man, his face bloodied, stares at the camera, which then turns to dead bodies, including an infant with a hole above his heart. “We didn’t have any weapons or anything,” says a young man leaning against a wall. Meanwhile, the fighting in west Mosul has intensified, with more than 1,100 munitions from the air and ground launched over the last week. At the same time, Iraqi military officials said the destruction in Jadidah had caused them to be more cautious in requesting airstrikes. “Our main goal is to keep the civilians alive,” Kenani said. “That’s our main mission.” Waely said Iraqi forces were now “rearranging the plan” for how they used intelligence information to order airstrikes.