Israeli liner operator Zim is forking out $320m to purchase seven containerships.

The Haifa-based carrier has purchased five 4,250-teu vessels and two 1,100-teu ships in a number of separate transactions.

The move marks a big step for the liner operator which has traditionally depended on chartering its fleet from the market.

Zim did not name the vessels which are built between 2007 and 2009.