West Midlands Police has said a "dedicated team of detectives" are working to trace material related to the pub bombings. A statement from the force said:
Considerable progress has been made with over 4,000 individual items collated, which had been previously stored by a number of different locations and organisations. This important work continues.
We have also made a commitment to consult independent forensic experts to assess whether more tests can be carried out.
Officers from the unit have travelled to Europe and engaged with a leading forensic provider.
When we have completed this work we will better understand what opportunities exist to bring to justice those responsible for the pub bombings.
More top news
A cold and blustery day with sunny spells and wintry showers.
Cold and breezy with bright spells and scattered heavy sleet and snow showers, some with hail and perhaps thunder briefly.
An 82-year-old lollipop man has been left too scared to return to work after a "senseless" attack in which his lollipop stick was stolen.