The U.S. trade deficit widened in September by an unexpectedly large 18.2 percent, the most in more than 10 years, as oil prices rose for the seventh straight month and imports from China bounded higher, a U.S. government report showed on Friday.

The monthly trade gap grew to $36.5 billion, from a slightly revised estimate of $30.8 billion in August. Wall Street analyst had expected the shortfall to grow modestly in September to around $31.65 billion.