San Francisco Mayor Ed Lee died early Tuesday morning at the age of 65. The cause of death has not been officially released.

A statement by the city read (via CBS San Francisco):

It is with profound sadness and terrible grief that we confirm that Mayor Edwin M. Lee passed away on Tuesday, December 12 at 1:11 a.m. at Zuckerberg San Francisco General Hospital. Family, friends and colleagues were at his side. Our thoughts and prayers are with his wife Anita, his two daughters, Brianna and Tania, and his family.

SFGate.com notes: “Former Mayor Willie Brown said Lee suffered a heart attack. Supervisor Hillary Ronen said the mayor was grocery shopping when he was stricken.”

Lee had served as mayor since 2011, after Gavin Newsom left office to become California’s lieutenant governor. He won election later that year and won re-election in 2015.

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