The sources said one young man was shot by a live round to the head, while two young men were shot by live rounds in the abdomen.
The invasion also led to armed clashes between Palestinian fighters, and the Israeli soldiers invading the refugee camp.
Eyewitnesses said dozens of soldiers invaded the camp, and were extensively deployed in its alleys, and that dozens of Palestinians hurled stones and empty bottles at them.
They added that the soldiers chased dozens of Palestinians in the alleys of the camp, and fired dozens of rounds of live ammunition, concussion grenades and gas bombs.
The army alleged that Palestinian fighters threw a homemade grenade at soldiers guarding the Qalandia Terminal; no injuries were reported.