Shadow justice secretary Sadiq Khan said David Cameron took the decision to go on holiday based on the intelligence that he knows.
He said: "He's got the intelligence at his finger tips, he will know what the events of last week, what they involve, with intelligence, he's got people advising him - he's taken the decision to go on holiday and it's a decision that he's got to stand by."
More top news
Sergeant Elor Azaria was caught on video shooting dead the wounded assailant, sparking one of the most divisive cases in Israel's history.
CAFOD said: "Hunger is evident in the thinness of children, and the way clothes hang from the bodies of people already suffering."
Police believe it is a "distinct possibility" that Halliwell was a serial killer, beyond the two murders he was convicted for.