Pakistan declared their first innings at 579-3 after opener Azhar Ali knocked his maiden triple hundred on day two of the first day-night Test against West Indies in Dubai on Friday.

Ali remained unbeaten on a 645-minute vigil of 302 -- fourth to score a triple hundred in Tests from his country - after Pakistan resumed the day on 279-1 at Dubai stadium.

Misbahul Haq remained 29 not out while Babar Azam made 69 and Asad Shafiq scored 67.

For West Indies leg-spinner Devendra Bishoo finished with 125.

This is only the second ever day-night match in Test cricket's 140-year-old history after Australia and New Zealand featured in the first in Adelaide last year.