London: Scottish actor Gerard Butler increased his security team at the ongoing Toronto Film Festival after receiving death threats.

The 41-year-old was promoting his role in controversial movie 'Machine Gun Preacher', a true-life story of Sam Childers, a former drug-dealing criminal who undergoes an astonishing transformation and rescues orphans in Muslim-dominant Sudan after converting to Christianity.

Butler was forced to hire more bodyguards when he took to the red carpet at the Canadian festival after reportedly receiving threatening messages, reports say.

“It is quite a controversial subject and some people are upset by the strong religious theme. We are treating this matter seriously,” a source said.