Police have released surveillance video in an effort to find who killed Porfirio Nunez, Johana 'Carmen' Nunez and Lina Sanchez inside the Lorena's Grocery Store on Sept. 6.

At a news conference at the West Philly store yesterday, Police Commissioner Charles Ramsey said the killings were “one of the most heinous crimes” to take place in Philadelphia in “quite some time.” He said police are following leads but need more help from the public.

The Citizens Crime Commission is offering a $25,000 reward for information leading to an arrest.

Tipsters are asked to call the Police Department’s tip line at 215-686-8477.