Seeking to tighten pressure on its arch foe, the United States imposed more sanctions on Iran, responding to an attack on U.S. troops, in Iraq launched by Tehran in retaliation for the death of General Qassem Soleimani, Reuters reported. Earlier, US President Donald Trump issued an executive order to impose sanctions on any individual or entity that works in the building, manufacturing, textiles or mining sectors of the Iranian economy, or any person that may help those who are taking part, in such a punishable behavior.