Around 400 grams of the explosive triacetontriperoxide (TATP) was discovered in a flat in Groningen where a huge explosion took place in May, according to Dutch prosecutors.

Two men will appear before the court on 30 July linked with the explosion, the service announced.

Explosives expert Jan Kapel told public broadcaster NOS that the amount of dangerous substances discovered at the apartment in Wibenaheerd was ‘enough to blow up a tank’.

A 27-year-old man who lived in the flat and a 20-year-old woman were wounded, and were later arrested under suspicion of having caused the explosion. A second 27-year-old man from Groningen has been charged with involvement, although the woman has now been cleared by the courts.

The substance, which was reportedly used by terrorists in attacks on Paris, Brussels and in the Manchester Arena in the past five years, apparently caused the explosion that injured the residents and led to the evacuation of around 50 more. Explosives experts conducted a controlled explosion at the site the following day.

The Telegraaf reports that police believe the suspects were making the substance, which has also been employed in attacks on ATM machines, to use or to sell.