The Taliban took responsibility for the attack, which destroyed part of the hospital in Qalat, the capital of southern Zabul province, and left a fleet of ambulances broken and battered.
The moderation in oil prices saw Indian stock markets close in the green and the Indian rupee paring its losses, closing 54 paise up versus the US dollar at 71.24 on Wednesday.
Saudi Arabia has sought help from international investigators and the United Nations, both lengthening the probe and internationalizing its conclusions.
The move comes after US officials claimed Iranian involvement in an attack on Saudi oil installations.
Iran sent a note through Swiss diplomats in Tehran on Monday, reiterating that Tehran denies being involved in the Saudi attack, IRNA reported.
Washington has said it has proof that Saturday's attacks on Saudi oil installations originated in Iran.
It is unlikely that even high crude oil prices would push up retail inflation high enough for RBI to put hold on expected interest rate cuts since the price rise effect is expected to be short term.
Uncertainty over the oil situation following a drone attack on Saudi Aramco spooks bourses, forces foreign institutional investors to pull out Rs 800 crore in a single day.
Responding to a question, Trump said the evidence from the recent attack on the oil units in Saudi Arabia indicated foul play from Iran.
British Prime Minister Boris Johnson and German Chancellor Angela Merkel discussed the attacks during a telephone conversation.
Khan expressed Pakistan's support for Saudi Arabia and "its full stand with all its potentials in confronting these sabotage acts which threaten the global economy and the kingdom's security."
There would be no supply disruption to India as Aramco officials have ensured that there will be no impact on distribution, says Dharmendra Pradhan.
Ayatollah Ali Khamenei said the US adopted a policy of "maximum pressure" on Iran because it believes it cannot bring the Islamic republic to its knees through other means.
There were fears that the rising tensions could spark a military conflict in the Gulf between Iran and the US or Saudi Arabia.
The crisis revived fears of a conflict in the tinderbox Gulf region and raised questions about the security of crude fields in the world's top exporter as well as other producers.