Updated

Three men accused of fatally stabbing five people at a Denver bar that authorities say was set on fire to cover up the killings have pleaded not guilty.

Dexter Lewis and brothers Joseph and Lynell Hill each face multiple counts, including first-degree murder, felony murder, robbery and arson stemming from the attack last October. They pleaded not guilty Friday.

Prosecutors have until July 26 to decide whether to seek the death penalty.

Investigators allege the men went to Fero's Bar & Grill intent on robbery. They were arrested after an informant for the federal government in another case told authorities he was with the men during at least part of the attack. A defense lawyer in the case has questioned the informant's credibility.