Bulgaria has released pictures of two suspected helpers of a bomber who blew up a bus packed with Israeli tourists last year, identifying them as an Australian and a Canadian

Such a Nice Boy says Mum

"A year after the bomb attack on a bus with Israeli tourists that killed five Israelis and one Bulgarian citizen, the authorities are seeking public assistance for information on two people suspected of having links to the attack," the interior ministry said in a statement.

The two were identified as 32-year-old Australian Maliad Farah, also known as Hussein Hussein – a bearded man with dark hair, thick black eyebrows and brownish eyes – and 25-year-old Canadian Hassan El Hajj Hassan – a man of lighter complexion, with a closely shaved head and a goatee.