SAN MATEO (CBS SF) — Two people were wounded early Saturday when gunfire erupted during a confrontation at the Marriott Residence Inn in San Mateo.

San Mateo police said officers responded to 911 calls reporting a confrontation between two groups of people at the hotel — located at at 2000 Winward Way — at around 12:35 a.m.

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Arriving officers found a shooting scene and two individuals requiring medical treatment. They were transported to the hospital and their condition was not known.

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Investigators said that “the shooting was an isolated incident between two groups of people who were visiting from outside of San Mateo County and not a random attack.”

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An intensive investigation has been launched. Anyone with information or surveillance footage related to the shooting were encouraged to contact Detective Sergeant Amanda Von Glahn at (650) 522-7782 or by email at avonglahn@cityofsanmateo.org. Anonymous tips can be submitted to http://tinyurl.com/SMPDTips or by calling (650) 522-7676.