Christopher Maffei
	Brooklynn and Devin Maffei

At approximately 3 p.m. Tuesday, Christopher Maffei, 43, is alleged to have taken his two children, Brooklynn, 3, and Devin, 2, from South San Francisco and fled the area in a rented white Ford Fusion with Arizona plates AKE-6303. Police say he drove to Ballena Isle Marina in Alameda where he stole the yacht, named "Unleashed” and sailed away.

The yacht was last seen at about 6 p.m. Wednesday in the area of Mare Island near Vallejo, according to police.

Maffei has expressed past interest in sailing to Monterey, Calif. and Mexico, according to police.

His rental car was found abandoned in the parking lot of the Alameda marina from which the 2007 sailboat was stolen on Tuesday, according to police.

Police said he had visited the owner of the vessel with the two children and inquired about buying it two weeks before. On Thursday, an extensive air and ground search was conducted by multiple jurisdictions but the vessel was not located, according to police.

The sailboat is white with "Unleashed” and "San Francisco, CA” painted on the stern. Brooklynn was last seen wearing a white, sleeveless dress with blue and green designs. Devin was last seen wearing a short-sleeve "SpongeBob” shirt and a diaper, according to police.

South San Francisco police are working on conjunction with several state, county and federal agencies to locate Maffei and the children. Anyone with any information on the yacht, the children or Maffei is asked to call the South San Francisco Police Department at 877-8900.