Cambridge Police report on two punching incidents yesterday:

Around noon:

[T]wo victims stated that while they were walking on Mass. Ave. by Memorial Dr., a man approached them and punched them in the face for no apparent reason.

The puncher was arrested, taken to a local hospital for observation, police say.

Around 9 p.m., a Harvard student walking through Cambridge Common was set upon by four teenaged ruffians:

Taken was his gym bag. The unknown males attacked the victim from behind, not saying anything just punching him in the head.

In an unrelated incident, a Cambridge resident reported somebody pushed in his air conditioner to gain entry to his residence, then stole two bottles of vodka from his freezer.