Poland's top police official told a radio broadcaster that a grenade launcher that was a present from Ukrainian officials accidentally exploded while he was moving it in his office this week. The explosion occurred on Wednesday morning at national police headquarters in Warsaw. Amid media reporters speculating on the incident, the Interior Ministry issued a statement on Thursday saying that a gift from Ukraine had exploded, and that Szymczyk and another person suffered minor injuries. RMF FM, citing police officials, said Szymczyk received two used anti-tank grenade launchers as presents during a recent visit to Ukraine. There were no other...