Israeli jets have bombed the southern Gaza Strip after a rocket was fired from the Palestinian territory into Israel.
There were no immediate reports of any injuries from either the bombing early on Thursday or the rocket fire on Wednesday.
An Israeli military spokesman confirmed the air attack, saying it had targeted a weapons production site in response to the rocket fired at Israel.
There were no immediate reports of any injuries from the strike, which witnesses said damaged a metal foundry in the town of Rafah, near the Egyptian border.
Rocket fire
The al-Aqsa Martyrs Brigades, the military arm of the Fatah faction led by Mahmoud Abbas, the Palestinian president, claimed responsibility for Wednesday night's rocket fire from Gaza - the first since Palestinian factions declared their own ceasefire with Israel.
The rocket landed at the kibbutz or agricultural commune of Re'im, in the southern Israeli Eshkol region, an Israeli military spokesman said on Thursday.
The rocket fire came after Israeli jets carried out raids on tunnels under the Gaza-Egypt border earlier on Wednesday - the first tunnel bombing since it halted its 22-day offensive on January 18.
The Israeli army said in a statement on Wednesday that its air force had hit a number of "Hamas smuggling tunnels" in retaliation for a roadside bomb attack by Palestinians on a vehicle patrol the previous day.
Gaza fighters had killed an Israeli soldier and wounded three others in the attack along a border fence.
Shortly after the bomb attack on Tuesday, Israeli aircraft killed one Palestinian on a motorcycle in an air attack.
Hamas confirmed that one of its members was injured in the attack in the town of Khan Younis.
The exchanges are the first major military developments since Hamas and Israel declared separate ceasefires earlier this month following Israel's offensive against the Gaza Strip.
PHOTO CAPTION
A member of Hamas security forces looks at the remains of spent ammunition and unexploded bombs, fired by Israeli warplanes during Israel's 22-day offensive, in Rafah in the southern Gaza Strip January 26, 2009.
Al-Jazeera