Palestinian security sources reported on Monday that at least one Palestinian was killed and three more were injured in a mysterious blast that rocked one of the houses in Jabalya town north of Gaza Strip.
Medical sources in Kamal Adwan hospital in north of Gaza reported that one of the residents who was identified as Ahmad Yousif Sari was killed in the explosion while his son sustained critical ihead njuries. Another two residents were also injured in the same incident. Security sources confirmed that the explosion was an internal and not an Israeli air attack.
Local eyewitnesses reported that they heard a huge sound of explosion in the House of  Ahmad Sari who is known as a member of  Ezz Al Din  Al Qassam brigade , the armed wing of Hamas.