Police are investigating two separate reports of shots fired in Dunmurray and Coleraine over the weekend.
In Dunmurray two masked men were seen in the Pembroke Manor area on Saturday evening after shots were fired at a house.
Police said they received a report of the “planned and ruthless attack” just before 7pm.
“Officers attended to find a bullet hole in the front window of the house, and a bullet located within an interior wall,” a spokesman said.
“Several cartridge cases were also found on the footpath and road.
“It’s reported that two masked men, dressed in black, left the area on foot.
“This was a planned and ruthless attack. Thankfully no one was home at the time, as this could, of course, have resulted in injury or loss of life.
“It’s also shocking that such a reckless act took place at a time when people, possibly children, would have been out and about and possibly passing by.
“I am appealing to anyone with information, no matter how insignificant it may seem, to contact detectives on 101, quoting reference number 1731 of 11/07/20.”
In Coleraine, damage was discovered to two windows of a property in the Willow Drive area following reports of shots fired at around 2.10am on Sunday.
Police described it as a “reckless attack”.
“An investigation is under way and we are working to establish a motive for this reckless attack. It is fortunate that no one was injured,” the PSNI said.
“I would appeal to anyone who was in the area and saw what happened, or who has any information which could assist our investigation to call detectives in Coleraine on 101, and quote reference number 437 of 12/07/20.”