About 700 New Jersey Police officers have tested positive for the coronavirus, the head of the New Jersey’s state police said at a coronavirus press conference held by state officials on Saturday.

“There’s more than 700 police officers quarantined at home and there’s about the same amount (…) that have tested positive from all 21 counties,” said acting State Police Superintendent Col. Patrick Callahan.

Callahan said authorities “track every single police officer” who test positive for COVID-19 but did not elaborate on what departments were most affected or provide an exact number of how many police personnel tested positive.

Callahan also indicated that two police officers who were reported as being in serious condition are improving.

The U.S. has more than 124,000 COVID-19 cases and New Jersey is second only to New York in the number of cases it has so far reported, according to a tracker from researchers at Johns Hopkins University. As of Sunday morning, New York has reported about 53,500 cases and New Jersey has reported about 11,000 cases.

On Saturday, the U.S. Centers for Disease Control and Prevention issued a domestic travel advisory, urging “residents of New York, New Jersey, and Connecticut to refrain from non-essential domestic travel for 14 days effective immediately.”

Write to Sanya Mansoor at sanya.mansoor@time.com.