The blood stains and a blood-smeared knife were found inside the office in Chakia on Monday, after which the forensic team was called in to take the samples.
Blood marks on stairs, a blood-stained cloth and a knife were discovered by the UP Police in Atiq Ahmed's partially demolished office. The gangster-politician was shot dead in police custody on April 15.
A senior police official said that the matter would be investigated in detail since some incident has apparently taken place here after the death of Atiq, his brother and son.
Police said red stains have been found near the stairs, adding that prima facie those looks like blood. A knife was also recovered during police investigation at Atiq Ahmed's office in Prayagraj
The Uttar Pradesh police decided to raid Atiq Ahmed’s office after his death, finding harrowing things inside the space such as blood stains and a woman’s undergarments.