A man was beaten unconscious and robbed of his wallet while another suffered injuries after being attacked in a downtown Mountain View parking lot late Monday night, police reported.

Leaving a bar on Castro Street at about 11:15 that night, a group of three friends were walking down a breezeway to a parking lot behind the 200 block of Castro Street when they were approached by a group of young men who started a fight with them for no apparent reason, police say.

At one point, police say, two men were dealing with five to six attackers, while the third friend, a young woman, looked on.

By the time police arrived, a 21-year-old Mountain View man had been beaten unconscious, while a friend who tried to help him, a 25-year-old Los Altos man, had a broken nose. Both had several facial injuries and were treated and released from a local hospital.

"It was really pretty horrific," said police spokesperson Liz Wylie. "Even when he was unconscious they were still kicking him." Wylie added that the fight did not appear to be gang-related or racially motivated, and that the victims did not know the attackers.

Although police believe that as many as six people joined in the attack, investigators could only find evidence to arrest three suspects: Eric Allen, 19, of Santa Clara, and Abe Tolliver, 23, of Mountain View were found by police several blocks away; and Jesse Campos Jr., 23, of San Jose was arrested when he returned to the scene of the crime after police arrived. Campos was pointed out by the female friend of the victims, who witnessed the fight but was unharmed.

Police say the additional suspects who joined in the fight did not even know the others, and just happened to walk by and decided to join in.

The three suspects in custody have been charged with battery causing serious injury. Allen was also charged with stealing the unconscious man's wallet, which police recovered minus the cash.

Additional charges went to Tolliver for marijuana possession. Campos had a warrant for statutory rape and was on probation for robbery.