The rupee opened on a weak note and declined by 21 paise to 69.64 against the US dollar on Wednesday, as the US-China trade-related concerns weighed on investor community.

Forex traders said that besides the US-China trade concerns, foreign fund outflows, heavy selling in domestic equities and rising crude oil prices also kept pressure on the Indian rupee.

The rupee opened weak at 69.57 at the interbank forex market and then fell further to 69.64, down 21 paise over its last close.The rupee had settled at 69.43 against the US dollar on Tuesday.

Trump had also announced to increase import tariff on USD 200-billion worth of Chinese products from 10 per cent to 25 per cent from May 10. Meanwhile, brent crude futures, the global oil benchmark, rose 0.43 per cent to USD 70.18 per barrel.Meanwhile, foreign institutional investors pulled out Rs 645.08 crore on a net basis on Tuesday, provisional data showed.