South Korea's president has urged China to help build the strongest possible sanctions in response to North Korea's recent nuclear test claim.

Park Geun-hye also warned of possible further action by North Korea, including "cyber terrorism".

Ms Park said South Korea would also continue its controversial propaganda broadcasts over the border.

Pyongyang says it carried out a hydrogen bomb test last week, but the claim has not been confirmed.

Analysts say the blast - which was detected as an earthquake - may have been a test of a weaker atomic weapon. If so it would be the North's fourth nuclear test.

The UN is already working on new sanctions against the country.

In an annual press conference, Ms Park said the international community's response "must differ from the past", without giving details, and that China's help was crucial.

She stressed China's past condemnations of North Korea's military nuclear programme but added: "I am certain that China is very well aware if such a strong will isn't followed by necessary steps, we will not be able to stop the North's fifth and sixth nuclear tests and we cannot guarantee true peace and stability on the Korean peninsula."

"I believe the Chinese government will not allow the situation on the Korean peninsula to deteriorate further."

China, North Korea's closest ally, has repeatedly condemned the nuclear tests but is often accused of doing little to try and stop them.

Last week US Secretary of State John Kerry urged China to take a tougher line with its neighbour, telling his Chinese counterpart in a phone call that it cannot be "business as usual".

In her televised address, President Park also spoke about the steps South Korea was taking with the US to "neutralise North Korea's provocative actions" including additional deployments of American military assets on the Korean peninsula.

Just hours before Ms Park's address, US politicians voted to impose stricter economic sanctions on North Korea.

Answering a question about whether Seoul would consider ending its involvement in the jointly-run Kaesong industrial zone, just north of the border, Ms Park said its future depended on Pyongyang's actions.

Seoul has already limited access from the South to only those directly involved in the zone's operations.

Courtesy: BBC