( CNN ) -- Belgian police are now confident that a shooter who killed three people at the Jewish Museum of Belgium was carrying a camera to record the attack , a senior Belgian law enforcement official told CNN Tuesday . Initial analysis of the surveillance footage from Saturday 's attack in Brussels had not conclusively shown he was carrying a video camera . However , the police still do not have leads on the identity or the whereabouts of the shooter , nor on the gunman 's specific motivation or ideological background , the official said . The official told CNN that investigators do not believe the attack was a `` hit '' targeting an Israeli couple who were two of those killed . There has been media speculation in the past several days in Israel and Belgium that the couple had ties to Israeli intelligence agencies . `` It 's clear from the surveillance video that the Israeli couple were not specifically targeted by the gunman . We believe they were just in the wrong place at the wrong time , '' the official said . `` If they had been the specific target , the gunman would not have continued with his attack by entering the museum . '' The two Israelis killed were a couple in their 50s from Tel Aviv , Israel 's Foreign Ministry said . The third victim was a French woman . A fourth person shot , a Belgian national who works at the museum , remains in critical condition , deputy public prosecutor Ine Van Wymersch said Monday . That contradicted museum spokeswoman Chouna Lomponda , who said Sunday that the fourth person had died . AK-47 assault rifle . Images from the museum in Brussels show the gunman behind Saturday 's deadly attack approaching the building , opening fire , and walking away . He used an AK-47 assault rifle to carry out the shooting , police said Sunday . Photographs and video released by Belgian police show the man wearing a cap and blue shirt , carrying two bags over his shoulder . The images do not show his face clearly . The shooter left on foot after the attack and headed toward a different part of downtown Brussels before he disappeared , according to police . Authorities are hunting the suspect , who is believed to have acted alone , Van Wymersch said . Investigators hope the public will help to identify the suspect . Terrorism has not been ruled out , Van Wymersch said Monday . Could the killer attack again ? It has been challenging to identify the killer because he was wearing a baseball cap , the senior Belgian law enforcement official told CNN on Monday . There is concern that the gunman could strike again , the official said , and that authorities could be dealing with a `` Mohammed Merah '' type of killer . Merah , a French-Algerian Islamist radical who received terror training with al Qaeda-linked militants in Pakistan , shot and killed three French paratroopers in two attacks in March 2012 before killing three schoolchildren and their teacher at a Jewish school in Toulouse , France , during a 10-day shooting rampage which he filmed with a camera attached to his torso . But the official stressed that no evidence has emerged in Saturday 's attack in pointing to any link to Islamist terrorism . The official said the killer shot the Israeli couple first in the museum entryway with one of his weapons . The couple had been consulting the wall display . He then pulled out a Kalashnikov assault rifle and shot the others inside the museum . Surveillance cameras picked up the killer walking on two or three streets before he disappeared . The official said the killer appeared to be skilled in using weapons and likely planned the attack meticulously . The official stressed Belgian authorities are investigating all possible angles , including Islamist terrorism , neo-Nazi attack , and other categories . With regard to the threat from Islamist terrorism , he noted there has been longstanding concern over the 100 or so Belgian Islamist extremists who received training in the Afghanistan-Pakistan region over the years , and high current concern over several hundred who have more recently traveled to fight in Syria . The concern is they might be able to use skills acquired there to launch attacks back home . Belgium 's Interior Ministry raised its terror alert level in the wake of the attack . CNN 's Pierre Meilhan and Elwyn Lopez contributed to this report .
Police think gunman was carrying a camera , a Belgian law enforcement official says . Investigators do not believe the attack was a `` hit '' targeting an Israeli couple who were killed . `` We believe they were just in the wrong place at the wrong time , '' says official . Score: 6