A 17-year-old Cambridge resident was arrested Tuesday night after a 30-year-old Boston resident was stabbed.

At 9:29 p.m. Tuesday, police responded to reports of a stabbing on Cambridge Street. The victim said he was waiting at a bus stop when someone walked up behind him, stabbed him and ran away toward the Lechmere T station, said Jeremy Warnick, director of communications and media relations for Cambridge police.

The victim had two stab wounds to his lower back and buttocks. He was taken to a local hospital for non-life-threatening injuries.

While the victim was being treated, police searched for the suspect – finding a person within minutes that fit a description given by the victim. The teen was found a few blocks from the location of the incident, standing in the doorway of an unoccupied Thorndike Street building with blood on his hands, Warnick said.

Crime totals for the year through Feb. 2 show a 35 percent decrease in violent crime from a year earlier and a 37 percent decrease from a five-year average, according the department’s Bridgetstat reports. It continues a citywide trend toward lower crime since at least 2010.

In 2013, the last full year for which police have presented data – a publication for 2014 is due in the spring – knives were used in 20 percent of aggravated assaults, making it the most comment weapon used. Nine of the aggravated assaults, or 5 percent, resulted in serious injury, including:

two stabbings outside a bar in Central Square, an unprovoked fight that turned into a stabbing in Harvard Square … a stabbing on Massachusetts Avenue between intoxicated persons, an acquaintance-related stabbing involving a Facebook page [and] a stabbing between known parties.

While the suspect in Tuesday’s stabbing has been arrested, “the investigation is ongoing,” Warnick said. Anyone with information is asked to call Cambridge Police at (617) 349-3300. Anonymous reports can be left at (617) 349-3359; sent by text message to 84741 (begin your text with TIP650, then type your message); or by email by visiting CambridgePolice.org/Tips.