First exports of coal from Mozambique's Moatize fields will be delayed as a result of problems in the construction of the Sena railway linking mines with the port, Portuguese news agency Lusa reported.

Brazil's mining giant Vale and Australia's Riverdale have invested heavily to mine Mozambique's estimated 23 billion tons of coal, planning to use the Sena Line for transport in the country with some of the world's largest untapped coal reserves.

Quoting Rosario Mualeia, chief executive of Mozambique's ports and railways company CFM, Lusa reported the delay may "not be significant", but did not provide details.

The line was supposed to be completed this month, which was already a 16-month delay from its original completion date. CFM last month threatened to cancel the contract with India's Rites and Ircon (RICON) if it did not complete the line linking the coal fields with the port of Beira by March 24. (Reuters)