More than 100 shell casings were recovered at the scene of the Tuesday night shootout at the Jose de Diego highway, including some from an AK-47 assault rifle, according to the police report.
The first multiple murder of 2013 in Puerto Rico took place Feb 21 in the eastern district of Canovanas, leaving three people dead.
Less than two weeks later, three young men were murdered in another incident.
The third multiple murder, in which three more people died, came March 3 in San Juan's Barrio Obrero neighbourhood.
Puerto Rico for years has been beset by a crime wave linked to drug trafficking that every weekend results in an average of 10 murders, the majority of them involving score-settling between groups of criminals warring over control of street-corner sales.
--IANS (Posted on 04-04-2013)