(CNN) Attempted murder charges were filed Saturday against a Philadelphia man accused of shooting six police officers during an hours-long standoff, according to court records.

The suspect, Maurice Hill, 36, was denied bail during a preliminary arraignment, online court records show.

The formal charges, including multiple counts of aggravated assault and assault of a law enforcement officer, were filed three days after Hill allegedly barricaded himself in a North Philadelphia row house when police attempted to serve a narcotics warrant.

Maurice Hill is taken into custody after standoff with police.

HIll also faces counts of assault of a law enforcement officer, reckless endangerment, gun possession and drug conspiracy. His next court appearance is September 5.

The Philadelphia District Attorney's office declined comment, saying prosecutors will announce charges against Hill and four others at a news conference Monday.