Spanish police investigate four more incendiary devices and letter bombs Sam Jones Police in Spain are investigating four more incendiary devices and letter bombs, a day after one exploded at Ukraine’s embassy in Madrid. The devices have now been sent to the prime minister, the defence ministry, an arms company that makes rocket launchers donated to Kyiv, and a military airbase near the Spanish capital, as well as the one found at the embassy. The first letter bomb exploded when it was opened by an embassy employee on Wednesday, causing minor injuries to the worker’s hands and leading Ukraine to warn its diplomats to bolster their security precautions. The second,…