An Israel Defense Forces strike in the central Gaza Strip on Monday killed three gunmen belonging to the Islamic Jihad group, Palestinian medics said. The IDF had no immediate comment. Israel often carries out strikes against militant targets in Gaza, which is controlled by the Islamist group Hamas. Medics said they had recovered three bodies from the site of an explosion that occurred after darkness fell outside Bureij refugee camp, near the Israel-Gaza frontier. Hamas television reports said the blast had been caused either by an Israeli air strike or cross-border tank fire. Clashes have increased of late between IDF forces and Palestinian gunmen since Israel and the Palestinian Authority resumed direct peace negotiations earlier this month. Militants in Gaza have fired a barrage of rockets into the western Negev, and Israel has responded with strikes on smuggling tunnels and terrorist strongholds. Hamas has refused to recognize the negotiations and vowed to take "effective" and violent measures to thwart the peace process.