KUALA LUMPUR (Reuters): Palm oil company IOI Corp Bhd on Friday said it would assist in any investigation after the U.S. Customs and Border Protection (CBP) said in a letter to an activist that it was probing the firm over forced labour allegations. KUALA LUMPUR: Malaysian palm oil company IOI Corporation said on Friday it had been made aware of a letter from the U.S. Customs and Border Protection (CBP) about opening an investigation into allegations of labour abuses at the company.