NEW DELHI: The National Human Rights Commission has issued a notice to Uttar Pradesh government over death of over 20 persons and injury to 100 others in a blast at National Thermal Power Corporation NTPC )'s Unchahar plant in Rae Bareli on Wednesday.The Commission has asked the UP chief secretary to send a detailed report within six weeks.Expressing its concern over the incident, the Commission has observed that a high level probe into the matter is immediately required to ascertain the negligence and errors, if any, behind the incident, which involves the Right to Life. It has also said that there is a need to ensure that such tragedies do not recur in future.The UP government has been directed to look into the matter and take utmost care to see that the families of the deceased are suitably compensated by way of monetary relief, without any delay. It has been asked to ensure that the best treatment is provided to the injured persons and steps are taken for their rehabilitation, said a NHRC statement.The incident happened around 3:30 pm on Wednesday when there was a sudden abnormal sound at 20 metres elevation and an opening in corner number 2 of the NTPC plant from which hot flue gases and steam escaped, affecting the people working around the area.The state government has ordered that necessary steps be taken for rescue and relief.The union power ministry has directed the NTPC Chairman and Managing Director to rush to the site.