Vandals have been condemned for firing air rifles at houses in Selby.
Police have warned that although no one was injured, the actions could have done serious harm.
A house in Bondgate and another in Wistow Road have both been targeted three times each over the last 12 months, and the culprits have not been caught.
The shootings have all taken place during daylight hours. The most recent happened just after 4pm on November 29 at the Bondgate house, while shots were fired at the Wistow Road house 45 minutes later.
Earlier incidents took place on September 10 and June 13 at Wistow Road, and on May 18 and January 14, 2011, at the Bondgate property.
A North Yorkshire Police spokesman said that although nobody had been injured, windows at the properties had been damaged, and there was potential for harm.
He said: “These were clearly acts of absolute stupidity. Firing any weapons at people’s homes could have dire consequences.
“Even if the air rifle pellet itself does not cause injury, shards of flying glass may hit people.
“If you know who is responsible for these mindless acts you should contact the police or Crimestoppers immediately.”
Anyone with information on the incidents, or who saw anything suspicious in the areas on the above dates, should contact North Yorkshire Police on 101, or Crimestoppers, anonymously, on 0800 555111..