In other words, there was a sniper aiming at the police who were overseeing a protest in Ferguson?

"Two police officers were shot here early Thursday morning as gunfire rang out in front of the police station, throwing into panic what had been a spirited � and at times tense � but largely peaceful night of protests. Demonstrators and police officers alike hit the ground when the gunshots echoed through the crisp air. Many people ran for cover. The police, clad in riot gear, dragged their wounded fellow officers to safety. Others crouched behind cars and walls, drawing their handguns or rifles as they rapidly swiveled their heads every which way to survey their surroundings.... The shots, which witnesses said they believed originated from the top of a hill about 220 yards directly across from the station, came just hours after the Ferguson police chief, Thomas Jackson, announced that he would resign, a move greeted with praise from protesters...."

UPDATE: A CNN "breaking news" email says: "St. Louis County Police Chief Jon Belmar called last night's shooting of two police officers in Ferguson, Missouri, an 'ambush,' saying the gunshots were directed at the police."