Toronto police have arrested a man with a history of violence on the TTC.

He’s now accused of hitting a fellow library patron with a chair. He’s also accused of hitting a pregnant woman in the face during the same incident.

Police told CityNews that on Feb. 28, the suspect was on a computer at Fairview Public Library, near Sheppard Avenue East and Don Mills Road.

He allegedly got into a fight with another patron over using the computer, and, in what police say was an unprovoked attack, hit the other man with a chair.

He then went to punch the man, who was there with his aunt. His aunt was eight months pregnant at the time. His punch missed its target, and he hit the woman in the face. She was bleeding, police told CityNews, but is otherwise OK.

Cassim Cummings, 24, was arrested Thursday. He is charged with four counts of assault, assault with a weapon, and failing to comply with probation. He’s expected to be in court on Friday.

Cummings has been previously convicted of stabbing a fellow TTC passenger, and has been accused of threatening passengers on the subway. He is considered dangerous, police said Wednesay, and if you see him, do not approach. Instead, call 911.

In May 2015, he was sentenced to four years in jail for the random stabbing of a stranger on a TTC subway near Davisville Station in February 2013.

Also that month, he was charged with two counts of assault and one of threatening bodily harm for incidents at Finch and North York Centre stations. He allegedly choked and threatened a man and repeatedly punched a security guard.

In 2013, Cummings’ mother said he is schizophrenic, bipolar and psychotic and hadn’t been taking his medication.

Related stories:

Man allegedly threatened TTC passengers while on probation for subway stabbing

Alleged subway slasher arrested & may face charges for other attacks

Mother of accused subway slasher says son is sick, not a criminal