New Delhi, April 30 -- US President Donald Trump has ended the waiver allowed to certain countries including India to buy Iranian oil and threatened sanctions if the embargo is not complied with. According to a recent White House announcement, countries that were granted import exemptions after the November 2018 sanctions would have to cease purchases of Iranian oil until May 2. The development came as bad news for India, which depends on Iran for nearly 10 percent of its oil requirements.

Among the other countries -- China, Turkey, Japan, South Korea, Italy, Greece, and Taiwan -- that were granted the six-month grace period, only the last three have halted their purchases of Iranian oil. There is little chance that the US will allow conti...