HAARETZ (Israel), BBC NEWS (UK)
GAZA CITY – Airstrikes carried out by the Israeli Defense Forces killed four militants Tuesday night in Gaza, reports BBC News.
Israel military forces said three of the militants were hit overnight as they prepared to fire rockets.
A fourth militant, reported to be a gunman from the Ezzedine al-Qassam Brigades -- Hamas's military wing -- was killed Wednesday morning by Tzahal.
Two large explosions shook Gaza City on Wednesday morning, reports Haaretz.
Israel said the strikes were in response to 52 rockets fired at Southern Israel from the Gaza Strip, which wounded at least three people.
Israeli and Palestinian schools on each side of the border have been closed amid fears of further armed exchanges.
This new wave of violence comes only a day after the emir of Qatar became the first foreign head of state to visit Gaza since Hamas took power in 2007.