One Belgian counterterrorism official told BuzzFeed News last week that due to the small size of the Belgian government and the huge numbers of open investigations — into Belgian citizens suspected of either joining ISIS, being part of radical groups in Belgium, and the ongoing investigations into last November’s attacks in Paris, which appeared to be at least partially planned in Brussels and saw the participation of several Belgian citizens and residents — virtually every police detective and military intelligence officer in the country was focused on international jihadi investigations.

“We just don’t have the people to watch anything else and, frankly, we don’t have the infrastructure to properly investigate or monitor hundreds of individuals suspected of terror links, as well as pursue the hundreds of open files and investigations we have,” the official, who spoke on condition of anonymity because he was not authorized to speak to the media, said.

“It’s literally an impossible situation and, honestly, it’s very grave.”