India has delayed the fourth launch test of its Agni-V three-stage missile due to technical issues with its battery.

The next test firing of the domestically built nuclear-capable intercontinental ballistic missile (ICBM) is expected to be conducted by the end of this year.

Defence Research and Development Organisation (DRDO) chief Selvin Christopher was quoted by The Economic Times as saying: "Our colleagues have said the issue can be resolved. We will do a test before the end of this year."

"We will do a test before the end of this year."

Christopher refuted rumours about the test being postponed due to India Prime Minister Narendra Modi’s visit to the US.

IANS quoted Christopher as saying: "The reasons for delay are only technical."

The fourth test was originally planned for last December, but was delayed for around three months until March.

The missile with a 5,000km range was test-fired from a mobile canister in January 2015.

Said to be the most advanced version of the Agni series, Agni-V is part of the Integrated Guided Missile Development Programme (IGMDP), which began in the 1960s.

Agni’s earlier versions, which are in service with the armed forces, are capable of hitting targets in Pakistan and western China.