Four Quebec police officers were arrested and released this week in connection with suspected ties to organized crime.
Two officers from the Montreal police force were arrested Thursday, one day after two Longueuil policemen were taken into custody.
Several reports Thursday said the officers were arrested and questioned in connection with an attack on a Montreal officer in Playa Del Carmen, Mexico two years ago.
Montreal police won't comment on the arrests.
One officer was reportedly suspended without pay, and the other one will be reassigned to administrative duties, said CBC reporter Lauren McCallum.
The Longueuil officers were arrested on Wednesday, questioned and released.
Authorities "don't know as of yet if there will be any criminal accusations," said Longueuil police spokeswoman Nancy Colagiacomo.
The South Shore officers have been suspended with pay, pending the investigation.
They are both in the early 30s, and have between five and ten years' experience on the force.