Police on Monday asked for information from the public to help find a missing Lake Como man after his car was discovered at the Belmar marina, leading authorities to search the Shark River.

A family member reported 56-year-old Mark Ritter missing Sunday afternoon, Belmar police Detective Capt. Thomas Cox said in a news release. Ritter's car was found at the south end of the marina.

Belmar authorities, joined by a K-9 unit and Maritime Emergency Response Team from the Monmouth County Sheriff's Office, State Police helicopter and boats were deployed to search the river and surrounding area, police said.

Anyone with information about Ritter's whereabouts was asked to call Belmar police at 732-681-1700.

Noah Cohen may be reached at ncohen@njadvancemedia.com. Follow him on Twitter @noahyc and on Facebook.