London, Aug 24 (IANS) Hollywood actress Helena Bonham Carter has halted filming the new 'Terminator' movie to fly back to Britain after four members of her family were killed in a car crash in South Africa.

Bonham Carter's relatives were on a safari holiday in South Africa when a minibus they were travelling in last Wednesday spun out of control and flipped over after a tyre burst, reports Contactmusic.com.

'Everyone here was in a state of shock when the news came through. I saw an assistant of Helena's who told me she is absolutely stricken with grief. She can't believe what happened,' said a source to the British newspaper Sunday Express.

The actress' cousin Fiona Bonham Carter, 51, escaped with a broken shoulder. But Fiona's son Marcus Egerton-Warburton, 14, her mother Brenda, 74, stepfather Francis Kirkwood, 75, and sister-in-law Kay Boardman, 54, perished in the crash that happened in a remote area which is a six hours' drive from Johannesburg.

Bonham Carter has been granted indefinite leave from the sets of 'Terminator Salvation' in Albuquerque, New Mexico, to fly back to Britain to comfort her distraught family.

This is the fourth instalment of the 'Terminator' franchise.