Amid growing concerns over shooting incidents around the globe, more gun violence in the U.S.
Local police say officers were shot during a standoff in New Jersey on Tuesday, and at least one was killed.
Two other officers and one civilian are reportedly in stable condition after being struck by gunfire.
Police are still responding to the incident.
Also on Tuesday, a gunman in the Czech Republic killed several people at a hospital in the city of Ostrava, located 350 kilometers east of Prague.
Another firing was reported Tuesday at a local hospital in eastern Czech city, leaving at least six people dead.
When Czech police deployed an emergency unit, the apparent suspect shot himself dead as police approached his car..