As suspected Islamic State terrorist was rounded up during a police raid on his apartment in the Netherlands that uncovered an assault rifle, explosives and an image of the ISIS flag, according to a new report.

Anti-terror police in the Dutch port city of Rotterdam stormed into the flat on Wednesday after receiving what was only described as a “tip” from Dutch intelligence services, the Daily Mail reported Friday.

Security officers found the 30-year-old man with an AK-47 and two fully loaded cartridges as well as a large amount of highly explosive illegal fireworks, mobile phones and wads of cash.

An enlarged photograph of the ISIS flag was also discovered, The Mail said.

The alleged radical, whose name was withheld due to Dutch privacy laws, was hauled into a Rotterdam court to face a magistrate.

The judge ordered him held for two weeks while the terror probe continued.

Law enforcement officials in the Netherlands have upped their threat level to the second-highest, believing there’s a good chance of a jihadist attack.