A new report have claimed that Mel Gibson "terrorized" his ex-girlfriend Oksana Grigorieva with a torrent of 30 furious phone calls the night she moved out of his Malibu mansion.

But a source close to the bitter break-up says that the "Mad Max" star never posed a threat to his baby mama or their daughter and recently hired an "unbiased observer" to accompany his visitation with 8-month-old Lucia.

"It was voluntary on his part, to assure that any further false allegations could be instantly refuted," the New York Daily News quoted the source as saying.

Recordings were reportedly made between 8 p.m. and 6 a.m. the night Grigorieva left Gibson following a tree planting ceremony in honour of Lucia. (ANI)