Police in India have distributed sketches of three suspects in Tuesday's explosions that killed more than 60 people in the western city of Jaipur.
Police officials in the state of Rajasthan said Friday that the three men, ranging in age from 18 to 25, were believed to have bought bicycles used in the serial bombings. The sketches were based on descriptions from shopkeepers.
Authorities released the sketch of another suspect the day after the blasts.
Police have questioned and released dozens of people, mostly Bangladeshi migrant workers, in connection with the attack.
A little known Indian militant group, the Indian Mujahideen claimed responsibility Thursday for planting eight bombs in Rajasthan's state capital.
Police say e-mails were sent to the media of video clips showing bombs strapped to bicycles. But officials say they are skeptical about the authenticity of the messages.
Many of the bombs that exploded within minutes of each other were planted on bicycles near Jaipur's Hindu temples and markets.
The famed tourist destination is home to a Hindu majority and Muslim minority. Authorities say they believe the attackers intended to provoke sectarian violence.
Some information for this report was provided by AFP, AP and Reuters.