In particular, did Spain formally declare war on the US first?
Britannica (without sources):
April 24, 1898
Spain declares war on the United States.
April 25, 1898
The United States declares war on Spain
On April 23, Spain reacted to the blockade by declaring war on the U.S.[citation needed]
It is easy to find the US declaration of war of April 25, 1898.
But I've not been able to find any Spanish declaration of war.
Did Spain formally declare war on the US before April 25? (In particular, on either April 24 or April 23?)