Chilean authorities will exhume the body of poet Pablo Neruda on Monday to determine whether he died of prostate cancer or was killed.

Neruda died on September 23, 1973, just 12 days after a right-wing military coup ousted socialist President Salvador Allende and brought General Augusto Pinochet to power. Neruda, a Communist Party member, criticized the coup and Pinochet. Twelve days later, he was dead.