While they usually cooperate, Islamic Jihad is more extreme than Hamas and has sworn to continue shooting rockets at Israel.
Last Thursday there was an armed confrontation between Hamas and Islamic Jihad's Al Quds Brigades. Apparently, members of Hamas' Al Qassam Brigades were mocking Islamic Jihad members and they retaliated by shooting. Hamas struck back, and someone ended up in the hospital after being shot in the legs.
Both groups are downplaying the incident.
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