A woman was hit on the leg with a hammer during an aggravated burglary at a house in Ballysally in Coleraine.
It happened at around 11.15pm on Monday night at Mossvale Park.
The men threatened two women who were inside and one of the women was struck on the leg with a hammer.
The men also smashed a window and three phones before fleeing.
Detectives are keen to hear from anyone who was in the area and who may have noticed the men, one of whom is described as wearing a navy Addidas hoodie. Police can be contacted by calling 101, quoting reference 2010 31/08/20.
An online report can be submitted using the non-emergency reporting form via http://www.psni.police.uk/makeareport/ . Alternatively, information can also be provided to the independent charity Crimestoppers on 0800 555 111 which is 100% anonymous and gives people the power to speak up and stop crime.