An Udaipur hotelier is being questioned by the police after he claimed to have seen one of the suspected terrorists, whose sketch was released, along with a woman two days ahead of Tuesday's serial blasts in Jaipur even as eight Bangladeshis were detained in Ajmer.

The owner of SamorBagh restaurant in Udaipur, Kamal Joshi told the police on Friday that a person resembling the sketch, released on Thursday night, was seen in his restaurant on Sunday evening.

He said that the man was accompanied by a young woman and both of them came to the restaurant at about 4 pm on Sunday. The woman entered the restaurant wearing a saree, but changed into a salwar kameez before leaving with the man, Joshi said, according to the police.

They did not take anything in the restaurant, he said. The in-charge of Surajpole police station Himmat Singh said investigations were on to check the movement of the duo in the town.

Rajasthan Police has also detained eight Bangladeshis near the famous Sufi shrine of Khwaja Moinuddin Chisti in Ajmer after they were found to be moving under suspicious circumstances.

All the eight are being questioned, Superintendent of Police (Ajmer) Anand Srivastava said.

Meanwhile, the Delhi Police received phone calls about people resembling the sketches and questioned some including an Afghan, but nothing was found against them.

The Rajasthan Police was preparing a sketch of another person suspected to be behind the Jaipur serial blasts.

The sketches had been prepared on the basis of preliminary investigations into the blasts and descriptions given by owners of shops selling bicycles, bags and ball bearings which were used in the explosions.

According to sources, all the four were suspected to have planted the explosives which went off within a span of 12 minutes at several localities in the Jaipur on the night of Tuesday.