Rioters believed to have attacked police and smashed shop windows during demonstrations against Israel's actions in Gaza in Kensington, west London, are being hunted by police.
Detectives are seeking aroud 40 people following protests outside the Israeli embassy in Kensington High Street, on January 3 and 10, including the six men pictured.
At least 55 police officers reported being injured during the demonstrations, including one who was knocked unconscious when he was hit by a metal object.
On January 3, around 12,000 people marched from Trafalgar Square to the Israeli embassy to protest against attacks in both Israel and the Gaza strip.
A small group of people tried to break through police barriers and even hurled fireworks at police officers. A knife was found embedded in the Embassy gatepost.
Some 13 people were arrested at the time, but around 17 people are still being hunted for offences such as serious violent disorder.
On January 10, a march of between 15,000 and 20,000 people took place from Speakers' Corner in Hyde Park, to the Israeli Embassy.
At the north gate of Kensington Palace Gardens, police were attacked by a small group of protestors throwing sticks and stones, and the gate was also damaged. People hurled metal barriers, sticks and stones at officers outside the Embassy itself.
Police arrested 24 people on the day, but are seeking around 20 more for offences including serious violent disorder.
Commander Bob Broadhurst, in charge of Public Order policing, said: "The Met will always facilitate lawful protest. However, what we have witnessed and what our officers have been subjected to was not and cannot be described as lawful protest.
"It is completely unacceptable that our officers were targeted in this way and subject to such violence and aggression. A small minority of people set out that day, not to air their views but to fight with police.
"I have no doubt that a small hardcore acted as antagonists during both demonstrations stirring up others within the crowd.
"We know that a number of responsible demonstrators worked hard to try and keep the hardcore calm, placing themselves in danger. The Met will not tolerate attacks on officers under the guise of protest. Our right to protest is an important one and should never be undermined by thugs and louts who simply want to cause trouble."
Anyone with any information is asked to pass it onto the Operation Ute investigation team on 07918 767901, or call Crimestoppers anonymously on 0800 555 111.