A Danish court has jailed a person until Feb. 9 without revealing any details of the case. Danish television channel TV2 said the suspect is a 15-year-old girl with Muslim extremist sympathies who had explosives in the basement of her home.

Prosecutor Peter Ahleson declined to disclose details, saying Thursday's custody hearing was held behind so-called double closed doors, meaning no information can be made public. Shrouded custody hearings are customary in terror cases.

Denmark's TV2 channel, citing the girl's now-closed Facebook page, neighbors and other sources, said the teen was a Danish girl who converted to Islam last year.

Police in eastern Denmark confirmed forensic officers and bomb experts searched a villa near Kalundborg, 120 kilometers (75 miles) west of Copenhagen, Wednesday. They declined to give more details.