DEVELOPING: People are being warned to avoid the area of an active shooting in Pittsburgh, Pennsylvania, according to Pittsburgh Public Safety. ATF is currently responding to the scene. abcn.ws/2O8dh6R 
MORE: ATF agents responding to active shooter in Pittsburgh. abcn.ws/2O8dh6R
NEW: Pres. Trump responds to shooting incident in Pittsburgh: "Law enforcement on the scene. People in Squirrel Hill area should remain sheltered. Looks like multiple fatalities. Beware of active shooter. God Bless All!" abcn.ws/2O8dh6R
BREAKING: Police responding to active shooter at Pittsburgh synagogue; there are multiple casualties, per local officials. abcn.ws/2O8dh6R
NEW: NYPD is deploying extra teams to synagogues and Jewish locations throughout New York City amid shooting at Pittsburgh synagogue. abcn.ws/2O8dh6R
NEW: PA Gov. Tom Wolf: "We are still learning details about the shooting at the Tree of Life Synagogue in Pittsburgh but it is a serious situation...Please stay away from the area and keep the congregants and law enforcement in your prayers." abcn.ws/2D7Mgz7
NEW: Vice Pres. Mike Pence: "Praying for the fallen, the injured, all the families impacted, and our courageous first responders. God bless them all." abcn.ws/2D7Mgz7
NEW: Sen. Pat Toomey: "The horrific events that transpired at Tree of Life Synagogue are heartbreaking. I'm monitoring the situation. My prayers are w/ the victims, their families, & friends." abcn.ws/2D7Mgz7
NEW: “We have reached out to Jewish community leaders and have directed officers to pay special attention to synagogues until further notice," Washington, D.C. police say. abcn.ws/2OccfXz
NEW: NYPD "deploying heavy weapons teams, including the officers from the Critical Response Command and the Strategic Response Team, to houses of worship across the City...Currently, there is no nexus to New York." abcn.ws/2D7Mgz7
NEW: First lady Melania Trump on Pittsburgh synagogue shooting: "My heart breaks over the news out of #Pittsburgh. The violence needs to stop. May God bless, guide & unite the United States of America." abcn.ws/2D7Mgz7
JUST IN: PA Gov. Tom Wolf in statement on shooting: "These senseless acts of violence are not who we are as Americans. My thoughts right now are focused on the victims, their families and making sure law enforcement has every resource they need." abcn.ws/2D6zcdn
MORE: Anti-Defamation League CEO Jonathan Greenblatt: "We are devastated. Jews targeted on Shabbat morning at synagogue, a holy place of worship, is unconscionable." abcn.ws/2D6zcdn
NEW: Pittsburgh Mayor Bill Peduto: "Area is NOT secure. All residents required to stay inside their homes until further notice." abcn.ws/2D6zcdn
