A video by the Syrian Observatory for Human Rights shows one of the cells that attacked a checkpoint of the security forces operating in al-Raqqah city, during an attempt by the last to arrest it after monitoring them for several days

http://www.syriahr.com/wp-content/uploads/2019/02/%D8%AC%D8%AB%D8%AB-%D8%AF%D8%A7%D8%B9%D8%B4.mp4