Image copyright Reuters Image caption Eight people were killed in Saturday's attack

Police investigating the terror attack at London Bridge, in which eight people died, have made another arrest.

The 29-year-old man was detained in Newham, east London - the 18th person to be arrest in the inquiry.

It brings the total number of people in custody to five. Twelve others, who were arrested on Sunday, were released without charge the following day.

One further man, arrested on suspicion of drugs and firearms offences, was bailed, the Metropolitan Police said.

The 29-year-old man was arrested in the early hours of Friday morning on suspicion of being involved in the commission, preparation or instigation of acts of terrorism.

Among those also in custody are a 27-year-old man and 29-year-old man, both from Ilford, who were arrested on Wednesday night on suspicion of preparing terrorist acts.

A 27-year-old man arrested on Tuesday morning and a 30-year-old man arrested on Wednesday morning are also being held, the Met said.

The attack took place on Saturday when three men drove into pedestrians on London Bridge, before abandoning the vehicle and stabbing people in Borough Market.

Police have named the attackers - who were all shot dead - as Youssef Zaghba, a 22-year-old Moroccan-Italian man who lived in east London; Khuram Butt, 27, from Barking; and Rachid Redouane, 30, who also lived in Barking.

The eight victims have been named as 30-year-old Canadian national Chrissy Archibald, Australian Kirsty Boden, 28, Australian Sara Zelenak, 21, James McMullan, 32, from Hackney, London, French nationals 26-year-old Alexandre Pigeard, Xavier Thomas, 45, and chef Sebastien Belanger, 36, and Spanish national Ignacio Echeverria, 39.

A total of 48 people were injured and London hospitals are continuing to treat 29 people - 10 of whom are said to be in a critical condition.