Uttar Pradesh police said on Tuesday that it did not have any information about any arrest from Bulandshahar by the Delhi police in the Aarushi murder case. "I am neither confirming nor denying the arrest of anyone from Bulandshahr by the Delhi police crime branch team. They have not given any information to the state police so far," Additional Director General (Law and Order) A K Jain said. Jain told reporters that CBI was investigating the case and the state police would assist it in all ways. In a major breakthrough,the Delhi police had yesterday claimed to have recovered the mobile phone of Aarushi. More than 16 months after Aarushi and her domestic help were found murdered at her Noida home,Special Operations Squad (SOS) of Delhi police's crime branch recovered the mobile phone from Bulandshahr on Saturday and have detained one person in this connection.