Three masked men, believed to be foreigners, armed with machetes, broke into the double-storey house in Nilai Springs Heights at 4.55am through a rear sliding window.

They robbed the occupants of RM14,900 in cash and valuables, said Negeri Sembilan police chief Noor Azam Jamaluddin.

He said three adults and four children were at home when the robbers broke into the house.

The intruders tied up two of the adults with telephone wires and covered them with blankets in the living room. They did not disturb the children who were fast asleep.

Azam said a security guard was asleep at that time and the closed-circuit television cameras were not functioning.

He said the robbers escaped with RM5,700 in cash, two gold chains valued at RM3,500, a diamond ring valued at RM1,200, a gold bangle valued at RM1,500 and three watches worth RM3,000.