Two people attacked and killed a North Sumatra police two weeks ago on Sunday. After jumping over the North Sumatra Police Headquarters fence, they stabbed the policeman on duty, Martua Sigalinging, to death. The police named four suspects in this attack, one of whom is Syawaluddin Pakpahan.

"(Syawaluddin Pakpahan) fought in Syria a few years ago," said Police spokesman Setyo Wasisto last week.

Three other named suspects are Ardial Ramadhana, F