The Democratic People's Republic of Korea (DPRK) Friday rejected South Korea's talks offer on Kaesong industrial complex and warned if South Korea continue to make situation worse it could take significant and ultimate measures first, Yonhap News Agency reported.

A spokesman of DPRK's defense commission on Friday said in a statement "If South Korea continues to make the situation worse Pyongyang will take grave action first."

He added that South Korea could pull out all its workers if the country worries about the safety of its workers who are still in Kaesong industrial complex at present and will give humanitarian support to the withdraw, Yonhap News Agency cited DPRK's official KCNA news agency as saying.

The response came after South Korea said that it didn't receive a reply from the DPRK by deadline.

South Korea's Unification Ministry proposed Thursday to hold a working-level talk with the DPRK over the Kaesong industrial park and asked the DPRK to reply by the noon of April 26.

The operations of 123 South Korean companies in Kaesong industrial complex have been halted for more than two weeks since April 9 when Pyongyong pulled out 53,000 DPRK workers from the industrial zone.