The number of people killed in Sunday's suicide bombing in Baghdad has risen to 250, officials in Iraq have confirmed.

A lorry with explosives was driven into a busy shopping area as families were out on the streets after breaking their Ramadan fast.

Most of the victims were inside a multi-storey shopping and amusement centre.

Islamic State has claimed responsibility for the attack.

Three days of national mourning were declared earlier this week in the wake of the bombing.

Al Jazeera reports that the current death tolls means Sunday's bombing is the deadliest attack in Iraq since the US-led invasion of the country in 2013.

Iraqi Interior Minister Mohammed al-Ghabban has offered his resignation following the bombing, citing failures in "having the different array of security forces work under a unified plan in Baghdad."

US Vice President Joe Biden has been called the Iraqi Prime Minister Haider Al-Abadi to offer condolences for 'the tragic loss of life' in the city.

Mr Biden is said to have reaffirmed "the unwavering commitment of the United States to help Iraq defeat ISIL so that all Iraqis may live in peace and stability".