Police have made a second arrest in an investigation into a car bomb placed under the car of criminal-turned-blogger Martin Kok, reports NOS.

The bomb placed under his car in July last year did not go off, but Kok was shot dead in December outside a sex club in Laren, North Holland.

Police have arrested a 26-year-old man from Utrecht, who is suspected of placing a bomb under Kok’s car. The bomb was 40 times stronger than a hand grenade and could reportedly have injured many people if it had exploded.

A 49-year-old man from Utrecht has already been arrested and is in custody. Police are investigating whether this attempt was linked with Kok’s murder.

Kok ran an escort agency and news website, Vlinderscrime, carrying reports based on his extensive underworld sources, and angering many by naming criminals and their families. He had himself spent 15 years in jail for murder, extortion and other crimes.