The Islamic Resistance Movement (Hamas) on Saturday vowed to revenge the Israeli killing of three Palestinian teenage boys in the town of Rafah between the southern Gaza Strip and Egypt.

"The crime of killing the three teens will never pass without a punishment and our people cannot stay with their hands handcuffed for such crimes," said Sa'eed Seyam, a senior Hamas leader in Gaza.

"This criminal act and this massacre indicate that Israel doesn't respect the Hudna, or the ceasefire that we have all signed upon," he added.

The Hamas leader went on to say that the ceasefire that the group agreed upon is mutual and as long as Israel practices its aggressions and killings, it should then carry the responsibility and the sequences for such attacks.

Earlier, three Palestinian teenage boys were shot dead by Israeli troops' gunfire in the town of Rafah near the borderline between the southern Gaza Strip and Egypt.

The deadly shooting is the first incident that Israeli troops sprayed gunfire at Palestinians in the Gaza Strip since 13 Palestinian factions and militant groups including Hamas declared a conditional ceasefire in an inter-Palestinian dialogue held in Cairo in mid March.

Palestinian militant groups agreed to keep calmness and halt attacks on Israeli targets till the year end provided that Israel stops violence against Palestinians and releases Palestinian prisoners.