A Bowie man was ordered held without bail Wednesday on a federal drug charge resulting from a sting operation that netted authorities more than 60 pounds of cocaine and an assault rifle, law enforcement officials said.

William Bowman, 31, was one of four men indicted last week by a federal grand jury in the District on charges of conspiring to distribute and possess with the intent to distribute more than five kilograms of cocaine.

The other men — Gezo Edwards, 37, of Silver Spring; Robert Richards, 35, of Seat Pleasant; and Willie Moorer, 37, of the District — are also being held without bail. All face maximum sentences of life in prison.

In court papers, prosecutors said that police and federal agents learned Bowman was promising to supply associates with cocain after they began tapping his cellular telephone in January.

Soon, prosecutors said, investigators were focusing on a storage locker Bowman used in Hyattsville, obtaining a court order allowing them to monitor his actions on closed-circuit video cameras.

On April 25, agents watched as Bowman and Edwards entered the storage unit and Edwards began counting what authorities recognized as “kilo quantities” of cocaine, prosecutors wrote in court papers. After breaking the cocaine down into smaller packages, Edwards exited the locker, leaving the drugs behind.

Agents and police searched the locker, where they seized the drugs, with an estimated wholesale value of about $1 million, an assault rifle and a pistol, prosecutors wrote.

When Bowman returned the next day to check the storage locker, prosecutors said, he noticed that the drugs were missing and immediately summoned his associates. When the men arrived, they were arrested, authorities said.