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Police asked the public for help on Wednesday in their search for a Pomona man suspected in a series of robberies in Orange County.

Ernesto Antonio Guerra, 19, and three other suspected gang members from Ontario were allegedly involved in several commercial robberies in Santa Ana, Anaheim and Garden Grove in early 2014, the Santa Ana Police Department stated in a news release.

The three other alleged robbers were in custody, but Guerra remained outstanding, the Police Department stated in the release.

Guerra is known to frequent the cities of Pomona, Ontario and Chino, according to police.

Authorities believe Guerra knows he is wanted and should be considered armed and dangerous.

Anyone with information on Guerra’s whereabouts was asked to contact the Santa Ana Police Department at 714-245-8422 or Orange County Crime Stoppers at 1-855-TIP-OCCS.