Violence flared at Manila in the Philippines on April 24 when port truckers were attacked while passing out fliers at a facility operated by International Container Terminal Services Incorporated (ICTSI).

The Philippine Daily Inquirer said six men were injured—including officers of a trucker advocacy group— after being attacked by armed port security officers who carried truncheons, rifles and shotguns.

A leader of the truckers organization was among those who suffered head and shoulder injuries during the attack by security officers who tried to stop fliers from being distributed at the Manila International Container Terminal, a facility operated by ICTSI. The paper reported that the RVV Security Agency guards were from ICTSI. RVV Security members at the site reportedly declined comment when approached by the Inquirer.

The truckers’ organization, known as “ACTOO” represents about 700 members operating 2,500 trucks at the container terminal. They have been protesting a new policy restricting trucker access to the port. The group held a three-day strike in February.