A Gaza security chief loyal to Palestinian Authority President Mahmoud Abbas was killed in a car bomb Wednesday, the second attack on security commanders in volatile Gaza in less than a week. There was no immediate claim of responsibility for the attack, which followed another bloody day in Gaza in which three Hamas men were kidnapped. One of the Hamas men was killed, and all three were either beaten up or shot before being dumped outside a gas station. The security chief killed Wednesday evening was identified as Nabil Hodhod, head of the elite Preventive Security Service in central Gaza. Security officials said Hodhod had just gotten into his car when a bomb went off. Hodhod was killed and his deputy wounded by the blast, the officials said. Masked Fatah gunmen appeared to be behind the kidnapping and shooting of three Hamas operatives in Gaza earlier in the day, Hamas officials said, although an investigation is ongoing. The gunmen snatched the Hamas members as they were leaving a Gaza mosque after morning prayers, a Hamas official said, and then threw them into a car, where they were beat and shot in the legs and the stomach. The gunmen then left the wounded men at a gas station in Khan Younis. Hospital officials reported the Hamas members in moderate condition. One later died of his wounds. The kidnapping was the latest violent incident between Hamas and Fatah, who have been battling for control of Palestinian security forces since Hamas ousted Fatah from power in a January parliamentary election.