This weekend was marred with random violence involving MBTA train stations.

Transit police in Boston arrested a man Saturday evening for allegedly improperly touching a woman at the JFK/UMass MBTA train station.

Early the next morning, a woman said she was attacked near the North Quincy T station before she was able to flee unharmed.

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Both of those incidents occurred just one day after two people were stabbed at the Blue Line’s Wonderland MBTA Station in Revere.

In the incident at the JFK/UMass station, the alleged victim told police she was walking up the stairs from the train’s platform on Friday evening when a man next to her reached out and grabbed her before “indecently assaulting her,” according to MBTA Transit Police.

The suspect, Charles Williams, 54, of New Hampshire, was ultimately identified by the victim to police, who detained him before discovering there was an existing warrant for his arrest over drug possession in Lawrence.

Williams was arrested on the spot for the warrant and also charged with indecent assault and battery for the woman’s groping claims.

The Wonderland stabbing resulted in one man being arrested and charged with assault with intent to murder and assault and battery with a dangerous weapon.

As a result of the alleged attack at the North Quincy station, Quincy police said there will be increased patrols in the area and issued a plea to commuters to be more aware of their surroundings, reported The Patriot Ledger.