Warsaw - Activists from a human rights organization have urged Poland to ban cluster munitions, the daily Polska reported on Thursday.

A petition has been sent to Polish Prime Minister Donald Tusk, asking him to subscribe to the Oslo Process and ban the controversial weapon, said Adam Bodnar of the International Helsinki Federation for Human Rights.

Responding to Foreign Minister Radek Sikorski, who the daily quoted as saying cluster bombs are "not so oppressive," Bodnar said "these are irresponsible words in the light of the international process" to ban the munitions.

So far 111 nations have agreed to a ban on cluster munitions under the Oslo Process. Countries like the US, Russia, China and Israel have not agreed to the ban.

Cluster bombs, which large numbers of smaller bombs or bomblets, have been criticized for carrying a high risk of maiming or killing civilians. (dpa)