Madrid - A 22-year-old man on the run after allegedly ploughing a van through crowds in Barcelona, killing at least 13, is "dangerous and could be armed," police in Catalonia said Monday. Police tweeted four pictures of Moroccan national Younes Abouyaaqoub wearing a striped top and with short, dark hair, and asked the public to "share as much (information) as possible." The death toll in the terror attacks that struck Spain has risen to 15, Catalonia's regional minister Joaquim Forn told reporters Monday, as a victim found stabbed dead in a car in Barcelona was linked to the case. "We are raising the number of victims from 14 to 15 to include the victim in the vehicle found in Sant Just," he told journalists. Soon after the van ploughed into pedestrians on Barcelona's famous Las Ramblas, another vehicular attack targeted pedestrians in the Catalan seaside town of Cambrils.