THE Philippine National Police-Anti-Cybercrime Group (PNP-ACG) has intensified its monitoring of certain websites to prevent them from being used by extremists as platforms to incite violence, officials said.

The move was triggered by the mass shooting at Walmart in El Paso, Texas, where 22 people were gunned down by a man who uploaded a hate manifesto on 8chan, a message board founded by Fredrick Brennan in 2013. Brennan, an American, has lived in the Philippines for years.