By Dan Whitcomb

LOS ANGELES (Reuters) - A lawyer for Chris Brown said on Friday that the pop star cooperated with police after a woman called 911 from his Los Angeles home and that contrary to her claims that he pointed at gun at her, no such weapon was found.

Brown, 27, was arrested on suspicion of assault with a deadly weapon on Tuesday after the woman, who has not been identified by authorities, called 911 from the home in the early hours that day. He was released on $250,000 bail that evening and has not been formally charged by Los Angeles prosecutors.

Police have declined to elaborate on the woman's accusations against Brown. The Los Angeles Times and have reported that she claimed Brown pointed a gun at her during an argument over a piece of jewelry.

The arrest came more than 12 hours after the woman's call, with police spending much of the day positioned outside Brown's home in the Tarzana neighborhood in Los Angeles' San Fernando Valley before obtaining a warrant to search it.

Attorney Mark Geragos told reporters at a press conference that he was at Brown's home during a lengthy search of the premises and that nothing was found to corroborate the woman's allegations.

"To the best of my knowledge, during the entire time that I was there, there was no gun or guns found in that house whatsoever and no drugs found whatsoever," he said, adding that police had acted professionally.

No jewelry was uncovered matching the description given by the woman, Geragos said.

He described Brown as cooperative with police and said that despite media reports describing a standoff, said that he had advised the singer to remain inside and to insist on officers obtaining a search warrant.

Brown posted a video on Instagram on the morning of the incident denying any wrongdoing and said he had woken up to find police outside the property.

"I don't sleep half the damn night I just wake up to all these ... helicopters, choppers is around, police out there at the gate," Brown said in the video.

In 2009, Brown assaulted his then-girlfriend Rihanna, and in 2015 finished a lengthy term of probation, community service and domestic violence classes.

(Reporting by Dan Whitcomb; Editing by Leslie Adler)