New Delhi: Twelve sympathisers of Pakistan-based Jaish-e-Mohammed (JeM) terrorist group have been detained in Delhi and Uttar Pradesh, a senior Delhi Police official said on Wednesday. "We have detained 12 people from Delhi and Uttar Pradesh for subscribing JeM ideology. They were detained late Tuesday night. One IED has been recovered from them," Special Commissioner of Police (Special Cell) Arvind Deep said. The official said all the suspected terrorists are under the age group of 30 years. "Some of them are permanent residents of Delhi and some are from the neighbouring state Uttar Pradesh," he added.