BOSTON (Reuters) - The chairman of biotechnology company ImClone Systems Inc. resigned on Tuesday under pressure from billionaire investor Carl Icahn, who considers the company's management incompetent and is seeking to gain control of the board.

NEW YORK (Reuters) - U.S. stocks may test record highs this week as muted oil prices take center stage. But the September jobs report on Friday could keep traders cautious and upend a rally.

Reuters - Teck Cominco (TCKb.TO) and the union representing workers at its Highland Valley copper mine in British Columbia have reached a tentative labor contract, the union said on Sunday.