GAZA, Jan. 5 (Xinhua) -- At least four Palestinians were injured on Saturday evening in an accidental explosion that wrecked three houses in the southern Gaza Strip town of Rafah, medics, security officials and eyewitnesses said.
Four residents of Rafah town were moderately injured in the blast, said Ashraf al-Qedra, health ministry spokesman in Gaza.
Eyewitnesses said rescue teams are still searching for survivors, while police and security forces have closed the area and launched immediate investigation.
Security officials in Gaza said the explosion came as a result of a technical error when militants were preparing an explosive device.
Dozens of accidental explosions have occurred in the Hamas-ruled Gaza Strip during the past 20 years, killing and wounding dozens of militants.