By Toby Sterling AMSTERDAM (Reuters) -A man who was arrested in Amsterdam after holding a person hostage at gunpoint for several hours in an Apple flagship store on Tuesday night had explosives on his body, Amsterdam police said on Wednesday. “We are investigating the possible motives of the hostage taker and the explosives he carried on his body”, police said in a statement. “Investigation has shown that the explosives were not ready to detonate.” The hours-long standoff ended dramatically late on Tuesday after Amsterdam police knocked down the heavily armed man with a speeding car on the cen…