(AFP) – Two Belgian policemen were arrested for helping a group of migrants return to France after they wound up in Belgium by mistake while heading to Calais, officials said Thursday. French Interior Minister Bernard Cazeneuve summoned Belgium’s ambassador to France, Vincent Mertens de Wilmars, to “ask for an explanation (and) express his displeasure”, the ministry said. The Belgian officers were arrested by their French counterparts in the border town of Nieppe late Tuesday after they brought the 13 Iraqi and Afghan migrants across the frontier. French police said the migrants had originally been in a truck believing they were heading for Calais — the northern French port from where they wanted to try to travel on to Britain — but got out after realising that they had crossed into Belgium. The Belgian police then picked them up on the side of the road, according to one of the Belgian officers, Georges Aeck. He told Belgian broadcaster RTBF: “We didn’t want to leave them… on the side of the road to walk to the border. “So we took them… in the direction they wanted to go.” The Belgian police took the migrants back to France in a police van, “but