More Californians who were on the Grand Princess cruise ship have tested positive for the coronavirus as officials try to find others who might be infected.

There was an outbreak aboard the ship during a cruise last month to Mexico, and some passengers who got off in the Bay Area became sick when they got home. An elderly Placer County man became the first Californian to die of the virus. A second elderly man who was on the cruise died in Sunnyvale, and officials believe he was also infected. Tests are pending.

On Saturday, officials in Santa Cruz and Madera counties announced new cases tied to the cruise ship, adding to four cases in Placer County and three in Contra Costa County.

“We are taking this situation seriously and are taking steps necessary to protect the health and safety of Santa Cruz County residents,” said Gail Newel, the county health officer, in a statement Saturday.