Thai police have issued an arrest warrant for an individual they described as a ‘foreign man’ according to a sketch released earlier in connection with the Bangkok bombing which killed at least 20 people and injured scores more.

This follows the release of CCTV footage showing a suspect leaving a backpack and walking away from the Erawan shrine minutes before the explosion.

In a press conference police chief Somyot Pumpanmuang said that it was not yet clear how many people were involved in the attack or whether they were still in the country.

“There are many possibilities because I believe that it is unlikely that this attack would be carried out by one person. It is likely that many people are involved and has some sort of backing,” said police chief Somyot Pumpanmuang.

They also offered a reward of 25,000 euros for any information leading to the bomber.

Breaking: Thai police release sketch of Bangkok bomb suspect – AFP pic.twitter.com/rs93n9mj0G— Jerome Taylor (Jero