The Health and Safety Executive is investigating after dozens of bricks fell on a bus stop near a derelict mill.
Police said about 50 bricks fell down after a third of an external wall collapsed on Blackburn Road in Church on Wednesday lunchtime. Hyndburn council has issued a notice declaring the Phoenix Work site dangerous and in need of urgent repair.
Deputy council leader and co-chair of Church and Milnshaw area council, Coun Clare Pritchard said the council would be investigating the incident, in which no-one was injured, as a matter of urgency.
She said: "It’s in a dreadful state and we are in discussions with the landowner."
Hyndburn council’s deputy chief executive, Steve Tanti said council officers visited the site with the Police and Highways authority.
He added: "Discussions have taken place with the owners who have instructed specialist contractors to undertake works to secure the site and undertake demolition works to make it safe.
"A section 78 notice has been served this afternoon following the site inspection, although the owner has elected to instruct his own agreed contractors to make it safe. The HSE have been notified of the incident and will be undertaking their own investigation."
A police spokesman said: "We received a call at 12.05pm to say that some bricks had fallen down from this building in Church.
"The external wall collapsed and about 50 bricks fell to the floor."
The road was reopened shortly after 2pm.
The mill owners were unavailable for comment at the time of going to press.