Transit on Prague’s “B” metro line between the stations Smíchovské nádraží and Zličín was not operational in the early hours of Tuesday – between 5 and 6 AM - after metro line dispatchers reported spotting suspicious movement on the tracks, according to the news site iDnes. Movement in the tunnel was spotted between the Lužiny and Nové Butovice staions. Employees of the transit authority as well as police officers and firefighters searched the area but found no sign of trespassers. After 6 AM, trains resumed operation along the entire line B but only sporadically at first. Between 5 and 6 AM, the Prague Transit Authority provided replacement busses for commuters.