There was a filipino priest who blessed a masonic marker. It was obvious that it was a freemasonic symbol and the words "masonic lodge" was also written above it, but the priest still blessed the marker. The organization where he was from issued an official statement, you can read it here.
I am currently reading the book about freemasons and so, I want to talk about it here.
Why you cannot be a freemason and at the same time a Catholic?
To put it simply, it is because what the Freemasons believe is irreconcilable with what we believe as Catholics. Freemasons believe that any god of any religion is true. How can you believe that and still think that you are a Catholic. As a Catholic, I believe that there is only one true God and that is the Holy Trinity, therefore I don't worship other gods and I don't believe that other religions are right.
Below is an excerpt from the book of John Salza. 
To better understand the reasons why catholics can't be mason, buy the book of John Salza - there is one review there by a person who claims to be a catholic and a freemason and he gave a low rating for the book. It just shows how ignorant some catholics are. I really recommend that you read the book so you won't be fooled into thinking that freemasonry is not a religion and if you're a priest, that you will learn even the basic symbol and info on why you shouldn't bless anything freemasonic.