SANTA CLARA — The search is continuing for a man who vanished during the San Francisco 49ers game Monday.

Ian Powers, 32, of Spokane, Wash., was traveling to Los Angeles, with a planned stop in Antioch to visit family. He also attended the football game at Levi’s Stadium in Santa Clara with his girlfriend, who told officers he left his seat to use the restroom and never returned.

The last communication Powers had with his family was about 10 p.m. Monday near Old Glory Lane and Great America Parkway, outside the stadium, according to Santa Clara police.

Police were notified about Powers’ disappearance Tuesday and started searching for him, said Capt. Wahid Kazem.

Powers’ vehicle was found where he parked it near the stadium. There were no signs of foul play.

On Wednesday, neighboring law enforcement agencies joined Santa Clara police in an in-depth grid search of Powers’ last known location.

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In addition to talking to Powers’ girlfriend and family, detectives are monitoring social media, cellphone and credit card activity; reviewing video surveillance at the stadium; and contacting public transportation agencies, hospitals, jails and coroner’s offices.

“At this point, all efforts to locate or make contact with Powers have not been successful,” police said in a news release.

Powers has since been entered into the National Missing and Unidentified Persons System, according to police.

Family and friends told police Powers’ disappearance is “completely out of character.”

“There’s no reason to suspect foul play,” Kazem said. “But by the nature of being missing, and it being so out of character, it’s a concern to us.”

Police said Powers was last seen wearing a red 49ers T-shirt, red 49ers hat and blue jeans.

Anyone with information about Powers’ whereabouts is asked to contact Santa Clara police at 408-615-5580.