New Delhi: Observing that the arrest of hotel owner Lavkesh Bajaj was "lawful and justified", a Delhi court on Thursday permitted the city police to interrogate him in custody for four days in connection with the blaze that erupted at his hotel in Malviya Nagar on Wednesday, leaving 21 people dead and dozens injured.The massive fire at Flourish Stay B&B, allegedly operating without a fire NOC in a congested bylane, claimed the lives of nine Indians and 12 foreigners. Judicial magistrate Bhanu Pratap Singh discarded the vehement submissions challenging the validity of the arrest of Bajaj and said, "...this court is of the view that the arrest of accused Lavkesh Bajaj is lawful and justified."