Weak tanker rates have taken their toll on Overseas Shipholding Group's (OSG) bottom line for the second quarter.

The US-listed company reported net income of $3.2m for the three months to the end of June, compared to $29.9m in the corresponding period of 2016.

It noted that the final result for the prior year included income of $34m related to its spin-off International Seaways.