Darnassus Attacked?

Objectives
Speak with Jaina in Darnassus.

You may speak with Seamus Goldenkicks in Lion's Landing to be ported to Darnassus.

Description
As you know, our night elven allies moved the Divine Bell you retrieved to Darnassus for safekeeping and study. Moments ago, they portaled some Highbourne [sic] mages over here to ask for backup. Details are hazy - some sort of stealth attack on the city?

I don't know what to make of it, but Jaina Proudmoore is already on the scene and I suspect they need all the help they can get.

Speak to Seamus Goldenkicks over there for a quick portal to Darnassus. Find Jaina!

Rewards
You will receive:
 * 118000 XP
 * +100 reputation with Operation: Shieldwall
 * +100 reputation with Operation: Shieldwall

Completion
The Bell is gone...

At the scene of the crime, we found traces of arcane magic... I may be able to use my skills to find the thieves.