LOS ANGELES, Calif. — The Boston Marathon explosions prompted the Los Angeles Police Department to remind the public today of the iWatch website, designed as a reporting mechanism for suspicious activity or behavior that might have a nexus to terrorism.

Calling it the “21st century version of Neighborhood Watch,” the site is designed to gather tips from the public, following the motto, “If You See Something, Say Something.”

“The iWatch program is the embodiment of community based policing and the police partnering with the community,” LAPD Chief Charlie Beck said.

Suspicious activities include unusual interest in building security measures, unattended vehicles in no parking zones and purchasing equipment or materials that can be used to make bombs.

People going to the site can remain anonymous if they desire.