At least four people including a couple were wounded when a homemade bomb exploded on Mirpur Road near the venue of Dhaka International Trade Fair last night. One of the wounded, Parvez, 22, told reporters at Dhaka Medical College Hospital that the bomb exploded when he was going to the fair along with his uncle and aunt. Parvez sustained burns in his left leg while Abu Nesar, 20, a tea vendor, in his right leg and forehead. The other injured are Saleha Begum 28, and her husband Abdur Razzak, 38.Parvez, a madrasa student of Magura, said the bomb went off on the Mirpur Road a few yards off Bangladesh-China Friendship Conference Centre. Panic gripped the trade fair visitors after the explosion at 8:15pm. Officer-in-Charge of Tejgaon Police Station Kamrul Islam told The Daily Star that snatchers might have exploded the 'cocktail.'