Safaricom customer using Mpesa [Photo/Techweez]

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Mobile network operator Safaricom Limited has sacked 52 employees after being linked to fraudulent activities within the company.

The employees were found to have been involved in asset misappropriation, fraudulent expense claims and corruption.

"While the number of investigations carried out during the year was substantively the same as Financial Year 2016, the number of staff dismissed for fraudulent behavior increased to 52,” Safaricom said.

Those guilty were also said to have been involved in fraudulent SIM card swaps and violation of rules governing money transfer service M-PESA start key issuance.

“While we are disappointed by the number of people who have been involved in fraudulent activities, it is encouraging to note the increasing effectiveness of our investigations and clear illustration of a ‘no tolerance’ approach from management,” the firm said.

According to the the company it intends to provide customers with the necessary skills to safeguard, detect and stop social engineering attacks targeting M-PESA users.

Safaricom has dismissed a total of 130 employees since 2014.