A series of explosions in the Indian city of Jaipur, in the state of Rajasthan, has left at least 80 people dead and more than 150 wounded.

Jaipur is at the centre of India's famous Golden Triangle tourist circuit that draws thousands of foreign visitors every year.

It was not immediately known whether any foreign or Indian tourist was a casualty in the explosions.

Seven separate explosions took place within 30 minutes in crowded markets and at city monuments.

One of the explosions occurred at a temple where a crowd had gathered for a Hindu celebration.

Seven synchronised blasts ripped through the Indian tourist city at six spots within a space 20 minutes of each other.

The explosions occurred in the Tripolia Bazar, where a Hanuman temple that draws a large number of devotees is located, as well as at Manas Chowk, Badi Choupal, Chhoti Choupal, Sanganeri Gate and Johari Bazar areas that are home to mixed populations of Hindus and Muslims.

Officials have swung into operation to impose stricter security measures on the tourist areas.

The bombings occurred days before India and Pakistan resume dialogue that has been stalled by the fluid political situation in the neighbouring country.

Tuesday's explosions were among the worst terror strikes in India after the Mumbai suburban train blasts in July 2006 that killed over 180 people.

Although Indian authorities are saying it was a terrorist attack, so far nobody has claimed responsibility for the bombings.

Indian Prime Minister Manmohan Singh has condemned the attacks but called upon the population to remain calm.