According to him, over the last few weeks tour operators in Britain, France and Germany -- Spain's three main markets -- have been receiving a large number of enquiries.
Orders were particularly high in the sectors of mechanical engineering, manufacturing of data processing equipment and electronic and optical products, the ministry said.
There were no immediate reports of casualties and it was not clear if Merkel was inside the building. Dozens of police and a fire engine attended the incident. The driver, who appeared to be in late middle age, was taken away in a wheelchair.