In the DICTIONARY OF DISASTERS AT SEA DURING THE AGE OF STEAM, I've found that
U16 sunk due to depth charges by Nembo (which was escorting the transport Bormida to Valona) on October 16th, 1916.
However, information on the uboat.net are different.

Anybody has more information about this?

TIA,
Capo

From the Dictionary:
"The destroyer Nembo was escorting the transport Bormida to Valona, Albania, on October 16th, 1916, when the latter ship was attacked by the Austrian submarine U-16. One torpedo was fired at the transport, which carried nearly 3,000 troops, but the Nembo intercepted it and was badly damaged. She nevertheless endeavoured to ram the submarine but the latter submerged. The destroyer then dropped depth charges which forced the U-16 to come to the surface in a sinking condition. Both vessels then sank together, the survivors comprising 11 of the crew of the submarine and a few of the 53 officers and men who formed the complement of the Nembo."