New Delhi, July 15 -- An Indian sailor was killed and 10 Indian nationals were injured, two of them seriously, when Iran fired missiles at two oil tankers in the Strait of Hormuz on Tuesday, prompting the external affairs ministry to summon the seniormost Iranian diplomat to register a strong protest over the incident. The Emirati oil tankers MT Mombasa and MT Al Bahiyah were "targeted by two Iranian cruise missiles while transiting the southern shipping lane of the Strait of Hormuz, within Omani territorial waters", the defence ministry of the United Arab Emirates (UAE) said on social media. The external affairs ministry said that of the 12 Indian nationals on board Al Bahiyah, one was killed and another was injured. Of the 18 Indian seafarers on the Mombasa, nine were wounded, including two who were reported to be seriously injured. There were 30 Indian seafarers among the combined crew of 46 of both vessels. Iran and US have intensified attacks in the last three days, stepping up a battle for control of the Strait of Hormuz that has pushed up oil prices to four-week highs. US has carried out waves of attacks for the third night in a row after Tehran said it had closed the strait. Iran has retaliated by hitting US bases in Gulf countries, including Jordan and Bahrain. The worsening attacks have increased doubts that a memorandum of understanding signed last month will lead to a permanent halt in the war. Tuesday's attack also caused fires that damaged both tankers before they were brought under control. Indian diplomats in the UAE are in touch with UAE authorities to ensure all possible assistance to the affected Indian seafarers. Hours later, Iranian deputy chief of mission Mohammad Javad Hosseini was summoned to the external affairs ministry, where the joint secretary heading the Pakistan, Afghanistan and Iran division, Anand Prakash, lodged a strong protest over the incident. The summoning was done in full public glare, with TV news crews covering the arrival of the Iranian diplomat, unlike other recent such incidents. Anger has grown on the Indian side over Iranian attacks on merchant vessels with Indian crew members, people familiar with the matter said. "We strongly condemn these acts of violence disrupting free and safe navigation through international waterways," the external affairs ministry said....