An MBA degree holder and three of his friends, all hailing from Manipur, were arrested for allegedly stealing high-end motorcycles in south Delhi, police said on Thursday. Nine high-end motorcycles and eight fake registration certificates were also recovered from their possession, they said. The arrested have been identified as K Sanatomba Singh, an MBA degree holder who works in an MNC in Noida, Rabi Masrur, Mohd Amir Hussain and Asem Kanta Singh. DCP (South) Chhaya Sharma said police managed to zero in on the gang after identifying Sanatomba from a CCTV footage in which his tattoos were very visible.