RAMALLAH (Ma’an) -- A retired Palestinian security officer died in suspicious circumstances on Sunday while being held in security custody, his wife told Ma'an.

Osama Akel Hassan Mansour, 49, was detained by security forces on June 19 as part of an investigation against corruption, a security statement said.

He was under investigation at the time of his death and was being held in a Ramallah detention center.

A security source told AFP that Mansour fell out of a window and died, adding that they did not know whether he fell or was pushed.

Mansour's wife told Ma'an that she believes her husband did not die naturally or commit suicide but was killed.

She had visited him on Friday and said he was in good spirits, joking and making people around him laugh.

She called on authorities to immediately undertake an autopsy to determine the cause of death.