Google has started rolling out Android 4.4.4_r2 update for the Nexus 5 only in India, New Zealand and Australia. Its a minor update which resolves network issues faced by Nexus 5 users in these regions. The official build of the update is KTU84Q.
Nexus 7 also received its Android 4.4.4 KitKat recently while Motorola too has begun seeding the new Android version for its Moto devices.