SPRINGFIELD, MASS. >> A Springfield man has been charged with forcing his way onto a school bus and threatening a bus monitor with a gun after two of his children were thrown off.

The Republican reports that Francisco Irenes pleaded not guilty Thursday to assault with a dangerous weapon and breach of peace while armed. He was held pending a dangerousness hearing scheduled for Tuesday.

The police report says the confrontation took place Wednesday after two of Irenes' three children were removed from the bus for causing a disturbance.

Police say Irenes showed up demanding custody of a third child, boarded the bus and threatened to beat up and cut off the head of the monitor, before pulling a firearm and waving it around.

Irenes' lawyer said one witness said no gun was displayed.

Information from: The Springfield (Mass.) Republican, http://www.masslive.com/news/