Huge crowds force evening closure of Super Bowl City

A woman has her picture taken as crowds jam Market Street to enter Super Bowl City Saturday, Feb. 6, 2016, in San Francisco. Long lines of people wrapped around blocks at several entrances to the free-to-the-public fan village designed to celebrate Super Bowl 50. (AP Photo/Eric Risberg) less A woman has her picture taken as crowds jam Market Street to enter Super Bowl City Saturday, Feb. 6, 2016, in San Francisco. Long lines of people wrapped around blocks at several entrances to the ... more Photo: Eric Risberg, Associated Press Photo: Eric Risberg, Associated Press Image 1 of / 103 Caption Close Huge crowds force evening closure of Super Bowl City 1 / 103 Back to Gallery

With huge crowds still descending on downtown at nightfall, San Francisco Police Department said it has closed Super Bowl City.

“The Super Bowl City venue has reached capacity and is closed in the interest of public safety. SFPD officers are working at all the gate entrances advising the public of this. Currently all the gates are closed and no one is entering the venue,” the department said it a statement at about 5:30.

The 10-acre Super Bowl City holds about 18,000 people. Alicia Keys, a 15-time Grammy winning singer, was scheduled to give a free concert at 7:30 p.m.

J.K. Dineen is a San Francisco Chronicle Staff Writer. E-mail: jdineen@sfchronicle.com Twitter: @sfjkdineen