LIMA, Sept 14 ― Peru's former president Alberto Fujimori returned to prison yesterday after being taken to the hospital last week with heart problems, his doctor said.

"After overcoming serious health problems that forced him to have prolonged hospitalisation, today President @albertofujimori is returning to prison,” Alejandro Aguinaga said on Twitter.

The jailed former president was hospitalised last Saturday "with cardiac problems,” Aguinaga announced earlier in the week.

He said Fujimori was undergoing tests after "suffering atrial fibrillation” or an irregular heartbeat, as well as from "pancreatic cysts.”

Aguinaga said it was Fujimori's third hospitalisation "in the last 40 days”.

Between his frequent hospital visits, Fujimori has been serving out a 25-year sentence for human rights abuses in a specially outfitted cell at a police base in Lima.

A court ordered him back to prison in October last year, revoking a pardon granted by then-president Pedro Pablo Kuczynski the previous December. ― AFP