Identify the geographical region of the following river.
The Tigris
The Tigris River is located in the Middle East, flowing through Turkey, Syria, and Iraq.
Complete the following task based on the instruction and optional input provided.### Instruction:
Identify the geographical region of the following river.

### Input:
The Tigris

### Output:
The Tigris River is located in the Middle East, flowing through Turkey, Syria, and Iraq.