A rocket fell in an open area in southern Israel on Saturday evening, setting off sirens in Nahal Oz near the Gaza Strip.
The rocket fire comes just two days after two commanders of local branches of the Islamic Jihad and Hamas terrorist groups in Jenin were killed in clashes with Israeli forces.
The two commanders were identified as Nidal Hazem, a member of the Palestinian Islamic Jihad movement's al-Quds Brigades and the commander of the Baha Force unit, and Youssef Shreim, a member of Hamas's al-Qassam Brigades.
A third individual identified as Omar Awadin and a fourth individual identified as Louay Khalil Al-Zaghair were killed amid the clashes as well and 23 others were wounded.
The IDF, Shin Bet and Border Police announced after the raid that they had assassinated Hazem and an additional member of the Islamic Jihad movement named Youssef Abu Ashrin.
According to the IDF, Hazem was involved in "significant terrorist activity" and Abu Ashrin was involved in producing explosives and firing at IDF soldiers, among other terrorist activity.
One of the other Palestinians killed was shot by Israeli forces after attacking the forces with a sledgehammer, according to the IDF. Israeli forces fired at a number of Palestinians who shot at them during the raid as well. No Israeli personnel were injured.
Hamas: Israeli crimes will not go unanswered
After the raid on Thursday, Hamas spokesman Abd al-Latif al-Qanou warned that "The crime of assassinating the heroes of the resistance in Jenin will not go unanswered, and our people and its resistance are capable of striking the occupation and making it pay the price for its crimes."
"The Palestinian resistance in the West Bank will remain present and escalating, and no one will be able to stop its expansion or prevent it from responding to the crimes of the occupation."
Israel and the Palestinian Authority are set to hold a meeting in Sharm el-Sheikh on Sunday in an attempt to lower tensions ahead of the month of Ramadan which is set to begin in the middle of the week.
Late last month, Israel and the PA held talks to reduce tensions in Aqaba.
On Friday evening, a Palestinian identified as Yazan Omar Khasib was shot and killed after attempting to stab an IDF soldier near Beitin.
This is a developing story.