Lebanon's interior minister says sit-ins and attacks targeting state institutions will no longer be tolerated.

Nohad Machnouk spoke Wednesday, a day after a group of protesters marched into the Environment Ministry in Beirut, occupying a floor of the building in a drawn-out standoff with security forces that lasted nine hours.

The protesters were demanding the resignation of the minister for his failure to deal with the country's trash crisis.

At a news conference, Machnouk said security forces will act decisively and with force from now on if protesters do not respond to orders.

Announcing the results of an investigation into excessive use of force by police during a protest Aug. 22, Machnouk said two police officers were referred to the Disciplinary Council and six officers will face disciplinary measures.