A Palestinian militant was killed in an explosion in the Gaza Strip on Wednesday, a health official said, prompting an Islamic group to threaten attacks against Israel.

The circumstances of the death were not immediately clear. Gaza Health Ministry spokesman Ashraf al-Kidra said the man was killed in an Israeli attack. The Israeli military said it was not aware of any incident and denied responsibility.

Al-Kidra said Mohammed al-Ejlla, 33, was killed near the border with Israel. He said two teenagers were slightly wounded in the incident.