Ten people have been arrested near Frankfurt, Germany, on suspicion of planning a terrorist attack, The Guardian reports. The suspects allegedly planned to use guns and cars to inflict mass casualties, and were detained during a police raid of 200 officers on Friday. Details of their nationalities have not been provided at this time, though police have reported the main suspects include a 21-year-old man from Offenbach and two 31-year-old brothers from Wiesbaden who are connected to Wiesbaden’s Islamist Salafist community. German broadcaster Deutsche Welle reported that police found more than $22,500 in cash, knives, and drugs during the raids. Prosecutors in Frankfurt issued a statement on Friday that read: “To prepare the attack, they had already made contact with different arms dealers, rented a large vehicle and collected financial assets to use for the purchase of guns and the execution of the planned murders.”