They are reporting the bombs were functional.
Just "functional"? The terrorists were content with some C-minus bombs which performed at a bare level of adequacy and didn't put any more effort into them? It's that kind of lazy, half-assed extremism which leads to your assassination targets surviving.
I am officially underwhelmed by whomever is behind this.
"Just functional" is actually a fairly high standard for amateur bomb makers. When you consider the technical problems of building and explosive device that doesn't explode just a little too soon, simple and easy is the way to go.
I'm impressed by their ability to deliver these bombs all on the same day. That will take some explaining.
I'm reminded of a story from the early 1970's, during the Northern Ireland "Troubles". A common bomb timer was a condom filled with acid, which was taped to a wire. The wire held a spring, which triggered the detonator. When the acid ate through the condom, it ate through the wire, released the spring and boom.
A condom was recommended because the quality control was a lot higher than the alternative, a common party balloon. There had been a string of premature explosions because no one really knew how long a penny balloon would hold the acid. This was a such a problem for one bomb maker, he went to a Protestant Pharmacy (Chemist) an purchased a pack of condoms. The Chemist recognized him as faithful Catholic and informed the Police. He was found in his garden shed trying to pour acid in a condom.