New Delhi, Jan 28 (Agencies): Concerned over Indian fishermen killing in the past one month, Foreign Secretary Nirupama Rao will travel to Colombo on Saturday to discuss the matter with the Sri Lankan government.

"External Affairs Minister SM Krishna has asked the Foreign Secretary to go to Sri Lanka on Saturday to discuss the killing of Indian fishermen with the government there," sources said here on Friday.

India had strongly reacted to the incidents in which two Indian fishermen were killed in the span of one month, notwithstanding Sri Lankan government's claim that its navy was not involved.

Terming the incidents as "very serious" and "unacceptable", India has said that such incidents have no "justification" and called on Sri Lankan authorities to "desist" from the use of force.

A fisherman was killed and two others were injured while fishing off Kodiakarai coast on January 22. The man, who had put out to sea with two others from Pushpavanam coastal hamlet, died after Sri Lankan Naval personnel allegedly tied a rope around his neck and pushed him into the water, fisheries department sources said.

On January 12, an Indian fishermen was killed in Palk Straits when Lankan Navy allegedly opened fire at three fishermen, who put out to sea from Jagadapattinnam near Pudukottai.