Four Boston Police officers now have tested positive for coronavirus, the department said, up from one over the weekend.

Boston Police spokesman John Boyle on Wednesday released the new number after the department on Saturday said that it had its first officer test positive.

All four are sworn officers, rather than civilian members.

Two members of the city’s fire department have tested positive for the disease; that was reported Tuesday, and the number remained the same on Wednesday, according to the union. One member of the Boston EMS also has tested positive.

Three MBTA bus drivers also have tested positive.

Statewide, 1,838 people have tested positive for the virus, and 15 have died, including two in Boston. The highly contagious virus, also known as COVID-19, continues to spread rapidly. Common symptoms include fever, coughing and shortness of breath, and while the vast majority of people do recover, it can be deadly among older adults and people with pre-existing conditions.