Newark public schools have been shut after a series of deadly shootings

A number of New Jersey schools have had to be shut down because of a spate of shootings.

New York’s New York City Public Schools, Newark’s Public Schools of New York and Bronx Public Schools are among those that were closed.

The Newark Public Schools district has closed all but six of its 17 campuses, and it is also shutting down the schools of four more schools in the district, according to NJ.com.

As of Friday morning, there are 11 schools closed in the city of Newark, including six in Newark Public schools and six in the New York public schools.

Newark Mayor Ras Baraka said in a statement that the city will reopen the schools “when all schools are safe and secure.”

The closures are part of a state-wide lockdown following the New Jersey shootings, which saw at least 13 people dead.

The Newark and New York schools have also shut down some day care centers, according the Associated Press.

A source told ABC News that the closures are “not related to the shooting at a New York day care center last night, but rather the response to recent events in New Jersey.”

Newark Public Schools said in its statement that its “zero tolerance” policy for bullying and violence has been in place since 2014.

The district also shuttered all of its public buildings and schools on Tuesday, including the city’s police headquarters, and closed the schools for the day, the statement said.

The Associated Press contributed to this report.