The target of Combs' alleged attack with a kettlebell, however, was an intern, the source said.
On Monday, Combs was charged with three counts of assault with a deadly weapon, one count of making terrorist threats and one count of battery. He posted bail Monday night.
His bail was listed online at $160,000 but Sheriff's Department officials told The Times it was set at $50,000 in their system.
A kettlebell is a round piece of weightlifting equipment with a handle usually made of cast iron.
Alosi has been an intense, if slightly mysterious, figure with the football program since UCLA Head Coach Jim Mora hired him in 2012.
Previously, Alosi worked for nine years in the NFL until 2010, when, on the sideline with the New York Jets, he stuck his knee out to trip an opposing player running downfield. Alosi apologized but was suspended and fined. Ultimately, he resigned and took a job at Bryant College, a small school in Rhode Island.
Alosi has not given an interview since joining the Bruins. Players have said he can be intimidating at times — not unusual for a strength and conditioning coach whose duties include motivation.
In 2012, safety Andrew Abbott said on a scale from 1 to 10, Alosi's intensity is "a 12."
On Alosi's first day, safety Tevin McDonald told The Times in 2012, "He was introduced and didn't say anything. He just put his hand up and nodded his head. We went, 'Oh man, he means business.'"
At the first workout, defensive end
Mora and the players have often credited Alosi for innovation and for helping the Bruins compete.
In a statement after Monday's incident, Mora said, "I'm thankful that our staff showed the level of professionalism that they did in handling this situation."