A cleaner in Riyadh, the capital of Saudi Arabia, has been showered with gifts from strangers, after a photo mocking him for gazing into a jewellery shop's window went viral on social media.

According to the Daily Mail, an Instagram user had shared the photo of Mr Nazer al-Islam Abdul Karim, 65, a Bangladeshi, with the caption: "This man deserves to only look at rubbish."

Twitter user Abdullah Al-Qahtani, 38, took a screenshot and set out to find the cleaner with a tweet on Sunday (Dec 4).

After over 6,500 retweets, users figured out his location from the shop window's reflection in the photo, in a day.

Mr Nazer, who earns 700 Saudi riyal (S$267.11) a month, told CNN: "I was just doing my job as a cleaner in the municipality and found myself in front of the gold shop. I am very happy about the gifts and very thankful."

Money is still being sent to him, according to Mr Abdullah, together with bags of rice and honey, return tickets to his homeland, and two mobile phones - an iPhone7 and a Samsung Galaxy.

A Saudi sports channel executive also posted Snapchat videos of Mr Nazer choosing a set of gold jewellery, and photos of him with the gifts.

And there seems to be no end in sight, as social media users, particularly Saudis on Twitter, say they will keep the gifts coming.

Mr Abdullah was impressed by the efforts to track down the cleaner, he told CNN, and the kindness and generosity of those who reached out to help.