India, June 13 -- Asian stocks tumbled on Friday after Israel conducted "pre-emptive" strikes on Iran; targeting several nuclear and military assets.

Israel also declared a state of emergency in anticipation of a missile and drone strike by Tehran and said it has begun intercepting Iranian drones.

The U.S. dollar advanced along with other safe-haven assets, including U.S. Treasury bonds and gold.

Oil prices were up more than 5 percent as the escalation of hostilities in the Middle East raised worries about disrupted oil supplies.

China's Shanghai Composite Index fell 0.8 percent to 3,377 as Israel-Iran tensions intensified and Sino-U.S. trade optimism waned. Hong Kong's Hang Seng Index declined 0.6 percent to 23,892.56 amid tensions ove...