New York City is upgrading security at its homeless shelters, with an emphasis on preventing violence.

Among other things, the city will re-establish a domestic violence program that ended in 2010. A new analysis finds that family incidents are the most common form of shelter violence.

The New York Police Department will retrain all security staff at the Department of Homeless Services. There also will be a more extensive reporting system for shelter incidents.

In February, police arrested a fugitive suspected of stabbing his girlfriend and all three of her children at a hotel used as homeless housing. The woman and two of the children died.

Mayor Bill de Blasio said Tuesday that his administration intends to "own the challenges of homelessness."