It's possible for a block to be mined without including any transactions in it, although it's not very common. When a mining pool creates a new block template, they include a set of transactions that they believe are the most profitable to include in the block based on factors such as transaction fees and size. However, miners are not required to include these transactions in the block they mine.

In some cases, a mining pool may choose to mine an empty block in order to quickly propagate it to the rest of the network and gain a slight advantage in the mining race. This is because an empty block requires less time to validate and propagate than a block with transactions.

It's also possible that the mining pool simply did not receive any new transactions to include in the block at the time it was mined, or that the transactions they had chosen to include did not meet the minimum requirements for inclusion in a block.

In summary, while it's not very common for a block to be mined without any transactions, it's not unheard of and can happen for various reasons related to mining strategy or transaction availability.