US crude fell by $1.46 to stand at $84.46 a barrel and Brent crude slid by $1.72 to $108.64 after insufficient measures to boost the US economy were announced by the US Federal Reserve.

While the Federal Reserve said it would extend the maturity of its treasury holdings, it did not offer more aggressive measures to boost the US economy, reports Reuters.

The comments overshadowed crude stock data, which, according to the US Energy Information Administration, fell 7.34 million barrels in the week to 16 September to stand at 339 million barrels, the lowest level since January this year.