Authorities plan to enter the booby- trapped apartment of the suspect in the deadly shooting spree at an Aurora, Colo., movie theater Saturday.

The suspect, James Holmes is accused of going on a shooting rampage at the movie theater during Friday’s midnight showing of “The Dark Knight Rises.” He was packing as many as 6,000 rounds of ammunition with the ability to shoot up to 50 a minute, police said.

Holmes’ apartment is believed to be loaded with explosives. Attempts to enter the apartment Friday were unsuccessful and police postponed efforts until Saturday.  The FBI, ATF and local authorities are working together to enter the apartment.

Sgt. Cassidy Carlson of the Aurora Police Dept. said that authorities have broken the mission down into three phases and plan to carry them out throughout Saturday.

"There are still unknowns, we're not exactly sure of everything that's in there," Sgt. Carlson said. The unknown includes jars that are believed to contain accelerates.

The first phase will be to render the area safe and address the immediate threat of the wire trip booby trap, which may include a controlled detonation. The public has been warned that parts of these phases may cause loud booms and have planned for reverse 911 calls for the area so that the public may remain informed.

Authorities say they will send a robot into the apartment.

The second phase will be to dispose of the aerial shells which will include placing the devices into sand trucks and taken to a disposal site for a controlled detonation. Authorities believe there may be up to as many as 30 shells.

The third phase will be the investigation of the apartment itself.

"There is no timeline, I can't give you an end time," Sgt. Carlson said. "We don't need to rush anything," she said.