Abdul Rehman, 46, was detained at a hotel in the red light district Nana area of the capital on Friday evening, said Thailand's Interpol chief.
"Thai Interpol tracked this suspect following an arrest warrant sought by the Pakistani authorities," Major General Apichart Suriboonya told AFP.
"He will be repatriated as soon as Pakistan is ready," he added.
Apichart said Rehman was suspected of being part of a criminal gang that was extorting the owners of a Karachi garment factory.
The fire at the Ali Enterprises factory in September 2012 was one of Pakistan's worst industrial disasters.
A judicial probe into the blaze was damning, pointing to a lack of emergency exits, poor safety training for workers, the packing in of machinery and the failure of government inspectors to spot any of these faults.
Initially the fire was believed to be an accident.
A murder case was registered against the factory owners, but it never came to trial.
Earlier this year police said they now believed an extortion gang was behind the blaze, naming Abdul Rehman as the suspect who allegedly lit the fire.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
