A man has been arrested over the theft of eight Henri Matisse artworks from a library in the Brazilian city of São Paulo.
He was apprehended after being "identified following investigative work and analysis of security cameras that recorded the criminal act," authorities said in a statement.
Earlier, police said they had identified one of two suspects behind the theft of the engravings and found the getaway vehicle.
Authorities said the late French master's works were stolen, as well as five pieces by the Brazilian painter Candido Portinari, from the Mário de Andrade Library in the centre of São Paulo.
Police said the thieves held up a security guard and an elderly couple visiting the library, took the engravings and other items from a glass dome where they were kept, put them in a canvas bag and fled through the main exit.
São Paulo's security department said that investigations were ongoing to identify the second suspect.
Brazilian news site G1 aired a video apparently showing one of the thieves carrying several of the artworks through the streets in broad daylight, then leaving them propped against a wall next to a pile of rubbish and running away.
São Paulo has a sophisticated surveillance system that uses security cameras and facial recognition technology.
Authorities have yet to disclose the value of the stolen pieces, which were part of a modern art exhibition entitled "From the Book to the Museum," highlighting a collaboration between the library and the Museum of Modern Art of São Paulo.
The theft came on the last day of the exhibit, which opened in October.
Newspaper Folha de Sao Paulo said the pieces on display included cut-paper collages from Henri Matisse's limited-edition 1947 art book "Jazz," of which only 300 copies exist worldwide.
His works can sell for millions of euro.
A series of around 60 of his drawings sold for more than $2.5m (€2.1m) at auction house Christie's in October, according to specialty site Artnet.
The record price for one of his works was $80.8m (€69m) for "Odalisque Couchee aux Magnolias" in 2018.
The five engravings by Candido Portinari, one of Brazil's most celebrated painters, were illustrations from the 1959 book "Menino de Engenho" ("Plantation Boy"), according to São Paulo city hall.
